Leveling my champions

DOOMBOT33

Hey guys,
which champions are worth leveling the most? And in what order? Have more 6* R2/3 or the best of them R4?
Heared DP X Force is really good, dont get why tho, cofuses me bc deadpool (normal) is ass apparently.

Thanks
DOOMBOT33

BRIXXV2

if you have not completed act 7 and act 8 , then level up mole man . so much damage and so must utility,

hulkbuster and herc are also good choices