Amumu
Riot hear me out, I feel like amumu is currently out of place right now ever since the updates. The new passive restricts him, only benefiting AP heavy comps. I agree it's way better than his old passive but I think he should be more than a dmg booster for your mid laners ap dmg. What I think? Most amumu players play him because of his amazing ability to set up team fights and to be able to melt the tanks that are on your carries. With this in mind, his kit should revolve around his ability to snare targets while dealing % dmg(like maokai). His new passive has the same name(curse) but instead of true damage, every 3rd stack of bandages on an enemy champion amumu snares the target and does a % of their max health. How these stacks occur is whenever amumu uses his Bandage toss(Q), E(forgot name), and W(possibly a new skill), they apply a stack of bandages and when the target is applied with 3 bandages within G seconds then they will get "cursed"(X second snare Y% max hp damage where Y is a value that increases every A/B/C levels and where Z seconds is the grace period). Obviously this might affect his jungle but he has his same E effect where it reduces CD when hit. As far as his ulti goes, everyone that gets hit are immediatly "cursed" and targets that were previously "cursed" and are on their grace period will have it refreshed upon contact with his ultimate(basically snares again). Base damage should be toned to compensate for his new passive damage and his ultimate no longer has its own snare because his passive is doing it for him. I believe this is how you can bring amumu back. Being able to peel, do damage to high health targets, set up team fights, and have amazing cc for ganks would make him versatile again. He would also have counter play like if you miss your Q then the long CD prohibits the 3rd bandage stacks and if the enemy doesn't AA then the CD for his E won't lower. The stun from his Q could also be removed so it's more like Lee sin Q and so he won't have the ability to have 3 CC chains cough Nautilus. But yeah there are many counter plays to implement so he won't be OP. Anyways this is just an idea to potentially re update amumu so feel free to add anything, comment, take ideas, etc.