well, a rammus ramming into you dealing 200-400 dmg. It's quite good with AP and an epic farming tool

ap rammus is useless it boost only ultimate u dont use powerball for dmg

I don't see the use of Hourglass on Amumu, and I think rushing Rylai's is better, just my opinion.

I don't want to down vote this or up vote this. But this is less of a chance that you get a good score with Amumu. Remember that you can run out of mana easily without mana regen in early game especially if you bought despair in the second level making you lose a lot of time respawning for mana. I see that you have 2 points in bandage toss. This is not really viable because your selling yourself short as the stun is the same and so is the length. It may give you 60 damage but the tantrum skill is better as it gives you a flat damage reduction.

Good Day!

Morde and Singed are known to be ap tanks, I don't add others coz these are the only ones I play, again, I made this purely for me ;D

about amumu, well you get the idea, max tantrum lol

I know it's your personal reference, however I like to comment :p

I think your Amumu skillbuild is messed up (Or I haven't played Amumu for a while), but he has 6 in tantrum :p

Nice build, it makes me wanna play Amumu again :p

And for Rammus, shouldn't you stack Taunt some more, or is it part of the AP Rammus? :)

And why don't you include more AP Tanks? :p
Like Morde and Singed