In WAR's case, it's damn near impossible to time it so that Mercy Stroke to be the final hit, especially now that the average level 50 DPS is going up and up and up. I get that it's useful on other classes like Dragoon, but, on WAR?
The added damage is so incredibly negligible when you factor in that you can only use it the last 20% of the fight and you almost never get it to go off for an added heal.
Mercy Stroke has two main uses as a skill:
Added damage
A healing factor

But WAR doesn't really get to make use of either of those, so what's the point of it? It seems like a pretty big waste of a skill. Especially when you consider that the two skills you get before and after it are Berserk and Butcher's Block, two incredibly useful skills that actually help with tanking.
So can Mercy Stroke get a buff or different effect that would actually make it useful for warriors? Something that would actually help with tanking?