HoundofShadow said: Focus on 5*. Do you play more pvps or pves?Also, how many cps and LTs do you have? I assume you don't have a lot now seeing how your Gargantos is at 9 covers.
ThaRoadWarrior said: With shards and saved covers being a thing, after you have a functional team of 4s and 5s I would stop putting iso into partial-build characters at all and just go from 70-champ on whichever 4* has the most rewards "in the bank" once you have the iso. As mentioned before, don't level your 5*s past your high leveled 4*s and you ought to be able to continue to hang out in your current PVP mmr without a lot of issues.