Cover was used three times in my static's T13 strat. I'd cover the Black Mage or melee during Earthshakers, the White Mage when the Storm of Meracydia spawned, and the Warrior when he Holmganged the second Akh Morn. I thought about using it for the first Prey in A1S since it's a physical attack but ultimately decided it would be too confusing with everything else that's going on. I'll use it in A1 normal if a DPS has to bring the adds right beside me or if someone's low on HP right before the Oppressors land from a jump.

Honestly, I like the skill and wish it had a shorter cooldown.