I've been playing Amumu alot lately and really like the character concept, but I think he's alittle bit too weak currently.

1. Bandage toss is fine for what it is, no complaint's there.
2. Depair need's a buff, currently at max it only drain's 3% of a enemies life per second, I think this skill should be buffed to 1/2/3/4/5% per level OR keep the ratio what it currently is, but make it actually drain the health from them to you. I think either would work fine.
3. Tantrum's a pretty odd ability, if the skill's not going to be radically changed which I think it should, then a buff to the damage mitigation is a must.

His ulti I have no problem's with I find it works very well.

Amumu is amazing, you just have to learn how to play him for max effectiveness

Amumu is a great character atm. Tantrum is a good ability, nvm a GREAT ability. Tank some creeps get hit 5 times go gank someone. The only problem he has is when he can't get close to someone. Well, the he is pretty much screwed.