The hardest part for me is not pouncing on the Interrupt key the instant I see that big ol' Quartz target castbar come up. "Owait, I'm NOT supposed to interrupt this one lolz!"

Unless I'm mistaken, FoK doesn't interrupt anymore.

Yeah I guess I worded that badly, I meant I miss FoK interrupts in the nostalgic sense of the word, would be pretty awesome for things like worship on cho'gall.

As a Frost DK, I am specced into Endless Winter because it makes me better than a Rogue at interrupting.

An off-GCD, short cooldown interrupt that costs zero resources. A Rogue that kicks may lose a Sinister Strike or an Eviscerate, but I can continue Frost Striking with impunity. I literally lose nothing by interrupting that boss spell.

But Frost DKs are often not spell hit capped, right? So it's not very reliable.

Nah, they added the +spell hit talent from Unholy to all DKs, so if you're melee capped you'll be good for spells, too.

Except for the Nerves of Cold Steel thing for DW frost, I suppose. That only adds hit to one-handed melee strikes, which doesn't include spells. And a 3% whiff chance is probably more than you want for your interrupts.