Achilles - An Endgame Neutraldin Guide

Find a handful of guides and walkthroughs here!
catsarelame
Imp
5 | 0
try and inventory of all azmodan's hearts, you need mana blood for more power.
Diaco
Son of Lucion
744 | 22
Common Love Badge
Earned over 20 cookies
Question: I've seen people max energy for this build... And I don't get it. Shouldn't 2k~ be enough and spend the rest in Vit?