Are there any other skills that don't damage during DR?

Okay, that confused me a bit. You're saying if he DR's at 45:15, I should wait until he stops DRing, then attack until 44:32?
Why only attack PB when he's in attack animation? I've heard this before but I'm wondering why this is needed (if the 17 second timer thing works like I think it does)?

Because when he is in an animation that is not DR, he aint casting DR.