Wow, this is incredibly surprising. Ouroboros is actually faster than Ziggy! Alright, then, let's get this show on the road, and drive that puppy into the ground! Start off with Dig. Go straight into the ground to dodge Will-o-wisp, then come out and attack for your second action. You should be able to withstand Reversal if you don't hit it for any more damage, so use Harden for your third action to brace yourself for the impact.
Dig ~ Come out and attack ~ Harden