I havent played the last few months, and a lot has changed since then.
Especially in PVP i used sentry a lot, because yeah… it was just godmode back then
But things have changed and i have stored up a lot of iso and i am not sure what 3* i should max next.
I have already maxed: deadpool, sentry, punisher (all with 13 covers).
I have with 13 covers but not maxed: patch, thor3*, human torch3*, falcon 3*, hulk, loki, daredevil
Leveling a 3* to 120 has become very affordable ISO-wise.
Since Torch and DD are not bad, especially when boosted, bringing them (and Hulk and any other reasonably covered 3*) up to 120 may be a good idea as well to get the maximum benefit from the weekly boosts.
Hey, best thing to do is to make an online roster (see my sig for 2 choices). This way you can keep track of everything and it will be loads easier to help you!