PoE Marauder, Mjolner builds

I found one on my first char and wanted to see if I could do something for the event, but I'm terrible at creating builds. I went away from Templar because I don't think crit is particularly easy to gear, so I wanted to try Chieftain with CwC fire conversion (PF trigger, WoC in weapon). DPS on this is like 400k and defenses are nearly non-existent. I could go glancing but would need a life on block shield I think. Any thoughts (including "this is terrible please stop") is appreciated.