I think you dont not understand the way i play amumu since I am not the tank am more like a semi-carrie / semi-tank

The skill order on your second build is inaccurate - you cannot have 4 points in Despair and 6 in Tantrum.

In addition, I strongly recommend not using Soulstealer - that's the only reason that this guide is getting -1s. As a tank, you'll sometimes find that your job is to die to keep your carries alive as long as possible. Dying means that you won't be able to sustain a Soulstealer's stacks.

may i ask if anyone of you tried to play him this way ?? cause i think not and you just flaming me

A soul stealer on amumu is a huge nono, sure there are those games when you're doing well and it works on any ap champ, but amumu is an INITIATOR and more often than not against good teams will end up dying after initiation. You say you get more kills than your carry? That's because you doing consistent aoe damage over time so are more likely to take the last hit. You're stealing kills from your carry handicapping the entire team.

Bro,I'm sorry but I can't agree with this guide being a good one.
AP amumu is possible, yes, but not like this.
You don't get any mana/mana regen items or runes so you will run oom every time there is a fight.
You say you'll have golem buff all the time? Sorry,but leave that one to carries.No, you aren't a carry.
You can do some nice magic damage there and have some survivability with this build,but that's it.
Then by the way with your golem buff,20 mejai's stacks,and your runes you will be over the cdr cap.
So I suggest a change of runes.Mejai's seems wrong in this guide to me...or at least make it an optional item if your team is doing well.
Last but not least - in fact the worst of all the things about this guide - is the way you wrote it - grammar and words used,sometime wrongly/oddly built sentences.
It might be just me but this thing stops me from upvoting even the best guides.