Mek/Siege Engine Doom

While I was watching Epicenter this weekend, one thing that I saw pop up here and there was mek being built on 4 position Doom. This isn't the first time I've seen this; puppey used this mek build at Shanghai and the way build goes is Tranquil Boots into a casual Buckler for early pushing before eventually finishing a Mekansm before branching off into stuff like a blink, shiva's and what not.

However, I recently tried a different approach to this build, opting for Arcane Boots instead of tranquils, sacrificing armor and regen for offsetting Doom's early mana problems and simply Devoured either the big satyr or a wild wing to cover my armor/regen needs depending on the lane. Now I went another step further, by building Guardian Greaves on Doom, I hope you guys can appreciate the irony.

All irony aside, greaves are actually pretty sick on a hero like Doom because he's already a solid aura carrier (which is how I play Abaddon minus the whole permaslowing thing) and he's a walking ultimate, so you may as well give him something else he can be good at.

Which is where I propose the siege engine Doom build. Your guys' thoughts?

I build it to, one of the best auras early because Schorted Earth + Greaves Regen = almost impossible to kill.

But Aside from this the item dont has synergy with him entirely, if you want an aura you have a plenty that synergy with doom, also Blade Mail seems good on him now, a stack armor build works on him.

If is just for the Mana Sustain/HP, buy Echo Sabre, it synergy with you because you have a 2.0 BAT, so it works better than AS