What Order would you champ these 4*s?

Marvel Puzzle Quest MPQ Tips and Guides Roster and Level Help
1

Currently Quake and Nova are at 260 en route to becoming champs 15 and 16, but where would you go next with my roster dear Reader?
Obviously if the covers come, Peggy shoots to the top of the list for iso. Punisher and X23 at the second priority step, but what about the rest?
Gather iso and champ whenever a relevant cover comes my way or is there a niche use character I’m missing out on? Bring everyone up to an arbitrary point (200 mibbies)?
I figure with 5 boosted 4*s per round, I’m less likely to have dead weeks without one or more of my champs boosted, and when I do, there’s OML to fall back on.

13 covers, yet to Max
Prof X, Elektra, Miles, Venom, Invisible Woman, Sam Wilson
12 covers
X23, Mr F
11 covers
Peggy, Gr, Punisher, Drax, Spidergwen
10 covers
Moon Knight, Carnage
9 covers
Blade, Kate Bishop

2

Your roster is in a similar spot to mine; I have thirteen 4* champs and eight more fully covered with lots at 12 or 11. At this point I’m just championing whoever winds up with a 14th cover. The boosted characters change every week so at this point it feels like it’s just important to champion more characters, not specific ones. With the current rate of ISO coming in it’s only taking 8 or 9 days to champion each one so it’s not like I’m making any hard choices.