Mockingbird - with America, you're going after AP for America's crits anyaways. with bobbi you get free casts/AP gain when enemy makes a match 4. Since America has no fireable powers, you can make the 3rd character in your team be one of those high damage/ high AP cost ones to maximize the free power casting.
If you're having trouble covering 4*s (meaning that it takes a long time) then you probably have to take what you can get instead of targeting certain ones. But if you're not having trouble covering them, (which is maybe implied by you already champing the 2 best) then here's my suggested pairings not mentioned above:Ghost + Chavez + [Hood]: depending on the level of your 5*s, Ghost may have higher match damage, plus she has a good red nuke, which can be recurring and even helped by the Hood.Carol + Rhulk + Grocket: team to fight high match damage, which takes advantage of Carol's buffing. Also works with a high level 3*Hulk and/or 3*Daken. The Hulks on this team could be replaced by XFDP.Carol + Star Lord + Grocket: good against PVE goons; you already start with beefy strikes, then Carol buffs them even more from Star Lord's CD tiles.Bishop - is generally awesome in Shield Sim and can stop threats quickly until you can deal with them.Vulture - is a 1 man band capable of killing an entire team by himselfMedusa - is generally awesome and even works with Carol.Getting covers in the 4* tier is supposed to take much longer than the 3* tier. Furthermore, 5* progress is meant to be even slower than 4* progress. So, set your expectations properly. If you can champ one 4* per week, then you're doing very well. I'm guessing the average is about every 10 days or so for 4* players. And don't hold your breath for 3*Grocket's champ rewards changing. I would bet money that it won't happen.
TPF Alexis said:
Eventually, you hit a sort of critical mass where you've got a bunch of 4* fully covered, and it's just a matter of getting the ISO to Champ them. At that point, depending on how you play, you're going to be champing one every 7-10 days or so. Looking at your Roster, I figure you're probably still a couple of months away from that, but you will get there if you keep going.
Currently, I have champed 8 4* and I have been a 100% FTP player for 400+ days. I have about 30 4* that are soon to be champed. Many of them are 1-2 covers away and I expect that my 6.5 million iso-8 will be withered down to fewer than 10,000 iso-8 when things start moving. Saved Cover is a wonderful feature that helps in some way with this wave of 4* hitting 13 covers. I'm actually glad that some of my 12-cover 4* are getting dupe covers instead of covers that upgrade them to 13-cover champion state.