Used stark for first one very easy have blade so you can taunt. Second one oscillate sucks he will not throw heavy even taunted. Map 5 should not be this hard it should be for 5/50 to 4/55 champs since we have map 6 and 7. For 4/55 and up. Not sure the goal of Kabam after one of the worst months in ages, with summer here in North America it is much easier to take a break so things should be increasing engagement not decreasing it.
You can also consider She Hulk against Hyperion Her SP1 & SP2 will definitely help you.