S/S Mountain Cottontail 2/2/2, H/H Blind Rat 1/1/2, Rapana Whelk 1/2/2 (didn't need it).
* Flurry (skip this if Gnasher is faster than your cottontail)
* Stampede until your cottontail is down.
- Bring in Blind Rat
* Call Darkness
* Sneak Attack
* Sneak Attack (Gnasher died here... my Blind Rat is H/H though...)
- If needed, bring in your snail, Headbutt and then Ooze Tough as suggested by strat above
Thanks for the tip with the roaches! I only had one fast one, but started the fight using it, his + swarm. Second, I brought out Silkbead Snail for Headbutt + Acidic Goo. Third, Masked Tanuki Pup for Powerball + Bite. Good luck!