I'm not doing coil yet, but when I've capped Mythos for the week, I just troll Mor Dhona with weird shouts.

"<Titan> <primal hard battle> Troll Party. Full Reindeer or Santa suits only. Wipe on Phase 1 or GTFO."
"Double Bacon Cheeseburger LFG. I come with French Fries or Onion Rings."

Also it's great when people reply and play along.