best setup?

iz4n4minok4mi

Hi everyone,
I am planning to get dark rukia in reio because I already have sogyo even though I originally didnt want it.. but what you can do when you miss the reset option at puzzle available only in the beginning
I have 2 questions either for those who already use this formation(sogyo, dark rukia, 8th skill or are good at theorycrafting
1. In what place (top, mid, bottom) would you place your main to reach the best results?
2.Would you make him attack first or second? (third place is reserved for sexy yoruichi so she can buff everyone after they use their skill or normal attack)
My two other assaulters are sexy yoruichi and zabimaru renji (the one from reio)

Thx for you answers :-)