This Video Is How I Run Elysian Realm 5.3 150 New Difficulty with Herrscher Of Bonker
Gear
My HOS gear is 1/4 PRI Domain Of Sentience level max.

Stigmata is Sirin Ascendant T Dirac MB.

S0.

Remembrance Sigil & Support Line-Up
Early Game

Mid Game

Late Game
Actually, everything that you've got the best, since this run using Mobius Strat, so it's doesn't matter i guess.

Chronologys
Floor 1

Floor 2

Floor 3

Floor 4

Make sure and choose Mobius Signet.

Floor 5
Getting Newborn [X] is a must in this floor 5, so you run Mobius Strat easier later.

Enter Phyllis Shop.

Floor 6 Phyllis Shop
Upgraded Lodging [C], Dark Pupil [T] and Newborn [X] at least twice.

Change your Remembrance Sigil & Support Line-Up (Mid Game)

Make sure and choose Mobius Signet.

Floor 7 Reward Stage
Getting Dead [X] is a must. Reset the run if you don't get this.

Floor 8 Benares
Sometimes, RNG is F you up and you're not get the last signet Unknown [X]. You can still clear the run without this and Mobius Strat or infinity loop is still work. But still prioritize Mobius Signet if appear in future after you clear stage.

Floor 9 Until Floor 17
At this point, Mobius Strat and infinity loop it's work flawlessly, you can choose whatever signet you want. If possible, i suggest you to choose signet that really help damage output for Senti. Such as Vissitude or Deliverance.

You should be able to clear double reward on floor 11 and floor 15. Just don't lose your mobius stack and you're good.

Floor 16 & Floor 17
Nihilus, Elysia or Mobius
After all of this, the boss on this Elysia Realm will be piece of cake. Senti is invulnerable while on herrscher or burst mode, careful after herrscher or burst mode is done enemy boss still can one shoot you, do a combo and gain SP again to enter herrscher mode.
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Careful with imaginary-taint that Nihilus have. Rest you can check on my video above.
I choosed Mobius in this run, because Mobius is easier than Elysia i guess. And Elysia is very seggggs tho..I can't :(
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Also, you can check my other post on HoYoLAB about mobius strat in more detail in the link below:

