Which 3 star to max out?

Newbieknowsnothing

I'm a newer player and all of these at sig 1-10. I have four star versions of magik, dv, gr and mordo so it looking for another hero to take up.

CA WW2
SL
SW
Wolverine
Crossbones
Captain Marvel
Elektra

Sonushaanu

Star lord i wish to dupe my 4*

K1lltastic

Yep, Star Lord, Scarlet Witch, or Wolverine are your best bets out of those. Scarlet Witch is still a good champ, just not god tier like she was.

Spidey076

No doubt sw.i have her as only 3* SIG lvl 42.she solo defeat chapter 2 round 2 kang in all or nothing node in master with 75% health remain.she is still god teir

HurricaneWarning

I would not consider another mystic based on your current line up. I would take SL or Wolvy.

I_am_Groot

All of them are worthy of maxed up.
But I would start with Crossbones and/or Elektra, and if you have they duped Wolverine and ScarletWitch.

I suggest you rank up champs 3 at times.
And the best is maxed up few champs than just level 10 (or whatever) many champs.

Also, you should know you'll evently maxeup MANY 3*, most of them in fact, it's the normal life in MCoC.
It's because 3* champs are the most worthy enough while abundant, and ISOs and Catas expire faster than 4* arrive.

Plus they're useful for Arenas (and some Quest, but you just need 5 here).

Superman69

SL or SW. The only characters whose 3* versions can be used in higher difficulties of the game.
Don't get me wrong wolvy is great, but the 3* version just doesn't cut it.
I did RoL with 3*SL. People do high difficulty event quests with a 3* SW and crit team. I know she's nerfed after 12.0 but she's still good.