One other way of making brd playstyle less reliant on random cooldown resets of bloodletter is to allow River of Blood to buff the next bloodletter for 1 bloodletter's potency worth of potency PER STACK of perhaps up to 5 stacks.

This way, not only does it make bloodletter procs less reliant on actually casting it asap but also helps brds actually weave in oGCDs better into their rotation during WM.