I've been doing some testing in this stage and
>STR Omega can barely tank normals, turn 2 in any slot with him and you're dead
>INT Buuhan with 3 rainbow orbs and 5-8 Ki orbs is dead if he gets caught by a Super
AGL Omega can reliably tank for the first 3 turns with a missing GT Bosses unit (meaning 5% less DR from his passive) and with 3-4 RBW ki orbs (easy to get) but both PHY Omegas get destroyed after the 2nd turn