Hello there,

Tell me... what would you do, if you could be truly immortal?

I would go to [War] and make peace by slaughtering everyone, who will stand up against me. Sounds like a great plan! And with this build it is possible.

You are invincible... as long as you can maintain between Energy Drain and Energy Gain. And all you have to do is... kill (and collect Health/Energy Orbs).
Don't worry, you got Your devoted servant who can help you with maintaining energy. And he is immortal, too.

[Assimilate] augment has one big downside... reduces speed to a slow walk and disables all maneuvers requiring the use of the jump or crouch buttons, etc. so you need a weapon that can [Reach] your enemies, fast and deadly in both light and heavy attack.

Enjoy, and be your own God of [War]!
THeMooN85