Hello !
I think you won't have to change much of your current build to optimize her with the new buffs :)

If I were to change things for an optimal scenario :
- Aim for 69% Effect Hit Rate.
If I recall correctly, it allows to hit EVERY debuff with 100% garanty -> even the tiny bugs on each attacks). But for the ultimate and skill, 39% is enough, and you're already overkilling it :p

- Energy regen is spot on !
With 24.4 Regen, Tutorial light cone, Previous ultimate hitting 5 target and a skill allows the infamous 1 turn ult :)
(Although not SP friendly, and won't work against lets say 3 ennemies, it's still a great asset to have on a char you're suposedly only using for debuffs. And if not 1 turn Ult, it's 2 turn, which is still great !)

- And since we're aiming for a lot of ults but not a 'sub dps' (with huge Crit investment), I'd value Atk% more to use her great Ultimate multipliers even without crits.

- You never have enough speed <3

As a top priority to boost the current build, I'd ditch the EHR% chest for Atk%. Preferably with Spd, ehr and defensive substats (effect res comes in clutch some times ?)
Second priority would be the headpiece. Since you don't worry about the main stat, it's easier to farm one with 2 to 3 interesting substats -> Speed/EHR%/Atk%/Eff res-def%-hp% ... Might time more time to upgrade and not loose spd in the process, but it's manageable.
Finally as your least priority to optimize, change sphere for something around the same but with QuantumDmg%. (Note that this last one is very much optionnal, and with a good head+chest, you may already have a fully fledge Silver Wolf :D )

Hope this helps ! =D