Fischl 
✦ Electro Off-field DPS Guide ✦
Welcome to my Fischl Guide! We will cover basic info while also going deep into mechanics and playstyles
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✦ Introduction ✦
Fischl is a 4 star Electro Bow user. This guide will focus on her role as an off-field DPS, able to deal good single target damage and generate energy for the team. We will also cover her use in Dendro teams and with Dendro reactions in general.
3.0 DISCLAIMER: Dendro is finally coming to Genshin and although what I write is the result of my experience, lots of research and testing it's just not enough to provide 100% accurate and future proof information about the new reactions and teams. All the guides for 3.0 will be reviewed as we experience Sumeru and edited with any new or corrected information. Any feedback is appreciated.
✦ Talents Overview ✦
✦ Elemental Skill: Nightrider ✦
Summons Oz dealing Electro DMG in a small AOE. Oz will remain on field and continuously attack nearby opponents.
• Hold the skill to adjust Oz's position. Press again at any time to reposition (this does not refresh Oz's duration)
• Oz has a chance to generate 1 Electro particle whenever he hits an enemy. With an average of 6,7 Energy particles per cast (10 seconds)
• Oz's damage will snapshot when summoned (repositioning when Oz is on the field will snapshot again)
• Oz's attacks follow an Internal Cooldown of 5 seconds/4 hits. This ICD is shared with her C6 Join Attacks
✦ Elemental Burst: Cliffbreaker's Banner ✦
Fischl takes Oz's form, greatly increasing her Movement Speed. Strikes nearby opponents dealing Electro DMG upon contact. Once the ability is over or interrupted, Oz is summoned. If Oz is already on field it's duration will refresh.
• Contrary to popular belief Fischl's Burst actually has a very tiny i-frame (invulnerability frame)
• Switching out of her Burst will allow you to cancel it and save time. Note that you cannot deal damage to the same enemy more than once
• If you are switching to Fischl to immediately Burst you can't switch right away again. Doing 2 auto attacks before casting your Burst is a good way to make use of that wasted time. Switch > 2 normal > Burst > Switch, below an example
✦ Normal Attack: Divine Marksmanship ✦
Fischl's basic attack is rarely useful as an Electro off-field DPS. It is recommended to not level up this Talent.
✦ Ascension 1: Stellar Predator ✦
When Fischl hits Oz with a full-charged Charged Attack, Oz deals AoE Electro DMG equal to 152.7% of the arrow's DMG.
• A cool talent but it's unfortunately mostly useless
• You can proc Prototype Crescent passive with it but it's not very reliable and often works only vs opponents that are lower than Oz
✦ Ascension 4: Undone Be Thy Sinful Hex ✦
If your current active character triggers an Electro Elemental Reaction when Oz is on the field, Oz will deal Electro DMG equal to 80% of Fischl's ATK.
• A very strong Talent that gives more significance to ATK stats and weapons, makes Fischl even stronger in reaction teams
• It has no Internal Cooldown, it will always apply the Electro element and is the reason she will be great in Dendro teams
• The cooldown of this talent seem to be as short as 0,5~0,6 seconds (KQM library)
✦ Talent Priority ✦
Skill > Burst >> Normals
Oz has the absolute priority for an off-field DPS playstyle. Your Burst comes second but doesn't need very high investment. Normal Attacks are rarely useful (except to burn the time of your switch) so they can be left at lower levels.
✦ Build and Artifacts ✦
Artifact sets
• 2 Thundering Fury / 18% ATK / +80 EM
Going for mixed sets is still one of the best options for Fischl, as it let's you focus on having great substats by not forcing you into a full set. Remember to build some EM, but only in Quicken teams.
• 4 Thundersoother
Keeping the Electro aura on your enemy is not a great game plan but now with Dendro and Quicken reactions it's an amazing set that will boost your Aggravate damage.
• 4 Gilded Dreams
The new Elemental Mastery set will be a great pick up for Fischl. For 8s after triggering an Elemental Reaction it will boost the user for 14% ATK for each party member whose Elemental Type is the same as Fischl, and Elemental Mastery by 50 for each party member of a different Element. Each of these buffs will count up to 3 characters.
Quicken/Aggravate does not like extra ATK too much but the EM is very welcome. This set has potential to be her best in slot, at least in certain situations.
• 4 Thundering Fury
The boost to Aggravate damage is nice and the Elemental Skill cooldown reduced could be useful sometimes but mixed sets or TS/GD should come on top of this option.
• 4 Tenacity of the Millelith
Even if she can keep up the set buff very well Oz does not benefit from it unless you reposition it to snapshot. It's generally not worth to miss on her damage for the Tenacity's buff but it highly depends on your team.
• 2 Gambler + Any
Gambler provides a +20% to Oz damage, even if summoned via Burst. It's unfortunately held back by 4 star main/sub stats making it a more viable option at low AR, if you are going to use this try to use Flower and Feather.
Main/Sub Stats
• Sands | ATK / EM
• Goblet | Electro DMG
• Circlet | C.Rate or C.DMG
Your substats will focus on Crit and ATK% followed by EM and ER%. How much ER you will need heavily depend on your team, usually you can get away with lower values.
In Aggravate (Dendro + Electro) teams, building some Elemental Mastery is very beneficial and gives a good boost to your damage. Crit Rate and Crit DMG will still have the priority in your substats. An Elemental Mastery Sands can be a good pick up here but it will come down to how many Aggravate reactions she will proc and the Sand's stats.
✦ Weapons ✦
Assumptions
• Oz off-field damage gameplay
• 2 TF + 2 Glad
• LV 80/90 C0 vs LV 90 enemy (standard resistances)
• LV 8 Talents
• Mid investment substats
• Atk Sands, Electro Goblet, Crit Rate or DMG Circlet
• No Buffs
These calculations take into account raw damage and no reactions. Dendro, and especially, Aggravate teams will enjoy some Elemental Mastery on your Fischl so weapons like Stringless become better. It is still not recommended to go full EM as Aggravate's base damage scales off EM but it will be further boosted by DMG% and Crit values.
✦ Dendro + Fischl Explained ✦
Before diving into Fischl's teams let's explain how Quicken reactions work.
Quicken (Dendro + Electro)
• When Dendro and Electro meet, a Quicken reaction will trigger, applying a "Quickened" debuff on the enemy.
• During this debuff applying Electro will trigger Aggravate, increasing damage for that instance of Electro. Applying Dendro will instead trigger Spread, increasing damage for that instance of Dendro.
• The increased portion of damage is calculated as a flat bonus that is multiplied by the user's Crit and DMG multipliers (like Shenhe and Yun Jin).
• The base damage of Aggravate and Spread are based off the Elemental Mastery and Level of the unit that triggers them.
✦ Teams ✦
The main purpose of Fischl in a team is to deal good amount of single target DMG and generating Electro particles while taking almost no on-field time to setup. Fischl is a very flexible unit able to fit a lot of different teams.
Let's list some of the classic teams and then explore the Dendro options:
Taser Teams 
Superconduct 
Yoimiya Overload and Overvape 
Quicken
Fischl's personal damage is going be boosted a lot by the Aggravate reactions, especially since her Ascension 4 Talent doesn't have Internal Cooldown, thus applying Electro every time and triggering Aggravate. Having a decent Elemental Mastery built is going to help but is not the priority over Crit.
Many Electro units can be played in these kind of teams. Raiden, Beidou, Yae, Kuki, Keqing are all great.
Collei and Dendro Main Char can be played together and are also interchangeable.
Kazuha and other Anemo units are able to utilize the Aggravate reactions via Electro Swirls. Kazuha is an amazing pick here even if he does not react with Dendro.
✦ Constellations ✦
Green = Very good
Yellow = Average
Red = Not important or worth
C1 • When Fischl performs a Normal Attack against an opponent, if Oz is not on the field he will fire a joint attack, dealing DMG equal to 22% of Fischl’s ATK. No benefits for off-field DPS playstyle. The joint attack from Oz counts as a Normal Attack. So any damage bonuses that apply to Normal Attacks also apply to this additional attack.
C2 • When Nightrider is used, it deals an additional 200% ATK as DMG, and its AoE is increased by 50%. An additional 200% ATK as DMG when summoning Oz, a decent boost but not too important.
C3 • Increases the Level of Nightrider by 3. A great Constellation, boosting directly Oz multipliers
C4 • When Midnight Phantasmagoria is used, it deals 222% of ATK as Electro DMG to surrounding opponents. When the skill duration ends, Fischl regenerates 20% of her HP. An extra AoE to her Burst + some healing
C5 • Increases the Level of Midnight Phantasmagoria by 3. Not a priority.
C6 • Extends the duration of Oz’s presence on the field by 2s. Additionally, Oz performs joint attacks with your active character when present, dealing 30% of Fischl’s ATK as Electro DMG. These joint attacks follow an Internal Cooldown of 5 seconds/4 hits, the damage is considered Elemental Skill DMG. Hands down her best Constellation.
All in all no Constellation is mandatory to play Fischl but C6 is great to have, especially with the new Dendro element.
END 
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