Quote Originally Posted by Reynhart View Post
Well, it's a little more complicated. Sure you can't use them at the same time, but you still technically use one when the other is on CD, so "fusing" them on a single slot can be tricky.
You don't have this issue with FireIV/BlizzIV or LeyLines/Between the Lines, since one pair is on GCD and for the other pair, one skill is a direct condition for the other.
I'm not sure what the problem is here.
No Grit, use Blood Weapon as normal. Pressed Q to activate it.
Blood Weapon on Cooldown. Turned on Grit. Blood Weapon button is replaced by Blood Price button. Use Blood Price. Pressed Q to activate it. Now both are on cooldown.

How would that be complicated? This exact system already exists for Fel Cleave and Inner Beast.