Why waste time using bloodpath on bosses when you can do same damage with colossus+stormbolt? With blue 463 weapon the Highest crit i've gotten with skull banner+colossus smash has been 351k without other extra damage modifiers (personal highest is 1.03 million crit with at gate of the setting sun).
If you're really lucky with crits, it can be your most damage done ability on bosses and even with bad luck still average somewhere 8-10% singletarget. That's about twice better than bloodpath what (without recklessness burst) averages somewhere 4-5% damage, at least when playing as arms.
I don't know, after last hotfixes my rotation also feels wrong too. Opportunity Strike and melee never really crit anymore (my melee crit average has been about 5% instead of 25% with buffs) and with OS i've had 40 hit streak without getting single crit... Is it just me or has anyone else got similar issues today?