When should I start leveling 3*

I’m a solid 2* player with 11 champed 2* ranging in level from 117 (Storm) to 101 (Ares). I’m starting to wonder at what point should I think about bringing some of my decent covered 3* up to level 94-100 (I read somewhere this was a good soft cap area for 3*). Before I joined this site I was idiot and spent iso leveling a few 3 & 4* early on. My best covered 3* are:

Storm lvl 40 11 covers
Hulk lvl 50 8 covers
Cpt Marvel lvl 55 8 covers
Cap lvl 40 8 covers
Colossus lvl 40 7 covers
Hood lvl 40 7 covers

I know most of those aren’t top tier 3*. Should I wait until I have some of the better 3* covered before I start pumping iso into them?

i’ll start by quoting my response to EF here…

I’m not sure how much assistance your 3s will provide just yet (storm might), but it won’t hurt anything to bring some up to 94 or a little higher. if you just have extra iso (and where you are in the game is about the only place iso will build up much) and want to use it, go for it. at 3 covers storm’s black won’t be very strong, but might fill some boards to take out some traps (against ninjas, doom or Elektra), and might be ok with strikes from daken or axw. storm’s best move is her green though, so that conflicts with axw. hope this helps.

Thanks that does help.