The only problem with otyughs would be if you're using feral bonds and firefly/skeleton spam, but otherwise a few quints will do the trick. It's really the steals that bother me. I'm sure you've realized, seeing as it's the focus of the deck, that immortal Titans cannot be stopped. If your SoGs are all being stolen, there's just no survival. Maybe instead the phase shields could be removed so you can outdamage the Titans, but it's still be extremely difficult for slower, more control-oriented decks.