Yes, I'm aware of mark of blood ability, but.. No phantom spell, remember? This takes 50% power of this strategy
, and anyway gorguana comes a bit late, so you still need to play midgame without it.
Also, boss fights will be even more challanging , ball or no ball..
edit: An alternative way to decrease power of mark of blood is to ban Awaken Dragon also.. hmm.. that should work, I think, no?