Champs most useful to get uncollected?

Junior_59

i have r4 5* ghost so that will help the most obviously and the rest listed are 4*s.

doom, void, hyperion, cmm (undupe), domino, stealthy, thing, quake, sunspot, warlock, voodoo, colossus(undupe), havok, red guardian, magik

avenge_123

my team was-
1.R5 4* CMM,domino,capiw
2.R3 5* sparky,BWCV
I became uncollected 2 months ago

u can easily become uncollected