Quote Originally Posted by RiceisNice View Post
It's 1.5 second cast on a 2.5 GCD, with the GCD starting when you begin a cast. That only leaves you with 1 second of of using oGCDs before your next weaponskill (which will be a cast unless you have a straighter shot proc) You can't use oGCDs during a cast. You can't immediately start a cast right after a oGCD due to animation locks, nor can you immediately do a oGCD right after an oGCD.

It doesn't weave well because you can't fit two oGCDs in the span of 1 second after a cast, not without it clipping into your next GCD by a split second to a second (which adds up in long fights).
You don't need to weave 2 oGCDs into one, it is okay to delay your cds by 1 or two seconds if it means you get another bloodletter. It is impossible to miss a bloodletter no matter when it procs, even if it procs right as you use another ability, and you delay it till the next ogcd. This has not changed from day 1.