Please delete this ****ty guide. Thanks to you, I am getting feeder fail Amumu's in my elo.

Which boots would you get? Or do you not get any boots?

Its a really bad guide. No pictures, no descript, no one is gonna look into this guide throughoutly.

Like you said, your damage as Amumu falls off hard, so why add Bandage Toss? Bandage Toss should be reserved for last, seeing that you don't need the damage, nor the CDR. If you always use it, it will be REALLY weird in the sense that you can spam it. Early on, you don't spam Bandage Toss. If you get to use it more than twice in a 3v2 gank, something is really wrong with that gank. Either your teammates do 0 damage overall, or they just don't care. Mainly teamfights last 10-15 seconds, leading to little chance of another Bandage Toss. Tantrum is wayy better, more reliable for damage, and unlikely that it cannot be spammed, whilst Despair may be just for a little more % damage.

Sustained jungling with Regrowth Pendant works, it generally gives you more gold earlier on, even if its slight amounts.

You have 10 end game items, 18 glyphs, no boots/major MS items etc. You seriously want to edit your build, or else it'll get ignored at best, flamed at its worst.