Quote Originally Posted by Falar View Post
Please explain.
That's how OGCDs work. They don't force you to make a decision during weighted GCDs. They're balanced primarily by their Cooldowns, sometimes by cost (Such as Aetherflow, the Tank Gauges), and so on.

Bloodspiller will not be an OGCD, 50 gauage, 400/540 - 475/650 potency ability. If we go by the generation of blood being its sole cost, it's going to be significantly weaker. Using the 15 seconds of TBN combined with Soulstealer spam at Base Skill Speed, you're looking at 70 Blood every 15 seconds. This means you get one Bloodspiller approximately every 12 seconds.

A comparable OGCD is the execution shot Archers gain, Misery's end, which is 190 on a 12 second cooldown, with a 20% health requirement. Given that Dark Knight is a tank and not a DPS, with a static +20% damage buff and without the 'execute' prerequisite you're looking at Bloodspiller being closer to 140-150. It may or may not have a Dark Art's cost in this iteration, but the baseline power is going to be significantly lower. It would be allowed to be higher if it had a significant cooldown by comparison.