o.O
2h + rampage on a 3.5+ attack speed weapon ftl. also, relying on flurry procs at <25% crit ftl. you read into the build incorrectly.
when you level 2h fury, you're supposed to use 2/2 imp slam, not work your way down to bloodthirst and rampage. BT !> MS until 3k AP anyway.
slam works based on weapon damage, just like MS, except the bonus damage is lower and there is no healing debuff... but unlike MS, there is no 6 second cooldown, and if you have the rage for it you can spam that sucker with only gcd slowing you down.
when i was farming last night/leveling my 2h mace skill (just crafted myself a Thunder), i actually spent most of the time in battle stance. charge > MS > slamslamslam (rage permitting). MS would crit for 1500 or so, then slam would crit for slightly lower again, and again, and again =) the highest crit i got with it was 1928.