50 PLD - fill in cross-class abilities or go for 60?

[Thunda_Cat_SMASH]

1k potency? Where are you getting that number from? In raids there's only ever one chance to lay into the boss with it, unless your dps are considerably awful... That's a single 200 potency hit, 300 max. Where do you get 1k from?

Regardless, it's not free DPS. They could have given us something, anything else from WAR and it would've been more useful. They could have given us access to overpower for AoE damage, they could've given us Berserk, even Vengeance! Instead, PLD gets a laughably bad cross class optionI in Mercy Stroke, at the expense of not being able to have other more interesting options... How can you be happy with an attack you'll use maybe once an instance, at most? I'm genuinely curious, what is the value of having an ability that deals such negligible damage you won't even save one second equipping it?