I will try your build I think. Though I will miss sever force.
I hit a 4.6k tonight (and I got the screens in case people think I would lie about it for some deranged reason). An Op that had around 17.5k HP,, so I would guess BMish?
I thought I was closer to BiS than I actually am (my Sage been retired since August, but was my only toon since early access). I got 741EXP, missing about 6 BiS WH mods, 2 WH Armorings for my belt/bracer, 1 BiS WH enh, and rolling a Columi, yes, Columi Hilt...
I have no doubt about it... its pretty close to 5k if you are BiS.