King Groot surprising Killmonger counter...
In my master and uncollected runs on Killmonger, I had to look long and hard at my roster for decent armor breakers to avoid his darn damage reflection when I noticed King Groot can inflict permanent armor break with his S1 as long as he has a fury. This ended up making Killmonger so much easier, especially with how defensive he is I could sit back and regen as needed.