Which 4* to let go of?

I ruthlessly culled my single-cover 4*s at your stage and it was definitely the right choice for me.

I know you said you want to keep Elektra, but there are two reasons why not to: a)she's really bad, and b) she has 2 3* feeders so you'll have her built in no time when you're ready. You will also get all three of her covers from daily resupply.

The exact same arguments apply to X-Force Wolvie.

I say this as someone who has both of them champed.

I wouldn't get rid of R&G, because once you get them champed, every level counts. To be honest, I think if I were you I'd ditch Elektra and Wolvie and see how things go from there - the rest will all be good some day.

    Without seeing your roster it's hard to see what your 3*s look like but I can give you some overall advice since I just came from your place a few months ago. 

1)  Make sure you only have 1 max champ in the 1* category.  Iron Man 35 or Juggernaut are usually the more popular choices.

2)  If you haven't already, look at these posts so you can get an idea of what people say are the best 4* characters in the game.  https://forums.d3go.com/discussion/67654/all-the-different-character-rankings.  Fortunately Peggy, Captain Marvel and Medusa are all three very solid useful characters.  (and I've heard Mockingbird and America Chavez are as well).

3)  The way I used to manage my 4* covers is I would look at the DDQ schedule.  https://mpq.gamependium.com/ddq/  When a 4* was required in the Behemith Burrito, and I had the 3*, I would try to hold onto the character until they were required for that node.  Then discard it when it was no longer needed.

4)  Take a look at the sneak peak section in the forum often to see which 4* is going to be required in upcoming PVE's.  https://forums.d3go.com/discussion/69833/mpq-sneak-peek-january-2018-edition-updated-1-24-18/p1.  You'll have a much easier time making full progression in PVE if you have the 4* required for the event and once that character is used, you will not need it for a long time to come, so you can probably get rid of it if it's not an overall useful character (an exception is with new release 4*s)

5)  Any character that has a 3X chance of being pulled I would keep.  You're more likely to get more covers of Nico, Rogue, & Rocket and Groot than the other three you mentioned because they have 3X more of a chance to be pulled.

6)  Don't pull any tokens like classic or latest legends that only give 4 or 5*s until you have most of your 3*s rostered.  Once you have more roster slots available you'll be able to start getting more covers through those tokens.

CenturyChild said:

EDIT #2: Somewhat unrelated, but in the past four days I've acquired five covers for Bag Man (all of them purple, lul) and while I know he's not a good hero, I've heard that the rewards you get for leveling him are pretty decent. Is it worth it at all to keep him or should I just sell those covers and keep focusing on 3*?

    Unless you play lots of PVP or lightening rounds you're not going to get a lot of covers for him and personally he's not worth a roster slot at your point in the game.  When you have more roster slots than you know what to do with, you can try to champ and level him up.  I'm pretty sure the only thing different you get when he reaches 144 is a legendary token but it may take you more a year or more to get there; so in my opinion it's not worth it.

  Hopefully some of my points were helpful to you and feel free to use the number 3) tool to add in your roster and if you have any further questions it might be easier for us to give you more specific advice with your roster included.  Here's mine if you want to see an example of how it looks https://mpq.gamependium.com/rosters/jtsings/.  I do have 2* rostered but they're not reflected in this roster tool.  It's also nice to see, with this tool, your roster growth and it's easier to look at than the in app roster interface.