Critique this build (500+str US/IR IW/EK Chieftain Marauder)

http://poeurl.com/MiR

I'm basically looking to min/max the absolute hell out of this, going to work on leveling it today and see where it's weak. Most likely starting out is going to be rugged and I may have to just start with the old leap and sweep.

I am hoping however that due to the amount of armor provided by Iron Reflexes + Granite flasks I can avoid the dreaded one shot of myself. Once I get my ascendancy I'll be able to leech off of the extra fire damage and the build also has almost 10% regen as well as a fairly decent life pool without any gear.

Any advice, comments or anything helpful really are appreciated, thanks.