2 zetas: Deathtrooper/Krennic or R2D2/Qui Gon Jinn

I'm having a hard time to apply 2 zetas. 7 star qui gon jinn and 7 star r2d2 (Number crunch) for arena (Anakin, qui gon jinn, Yoda, r2d2 and aayla/zylo) don't have Kenobi or 5 star Krennic ...