The person’s injuries will still compound quickly, but once thet have a grip of a squirrel, it wouldn’t be especially hard to lethally injure.
Personally I wouldn’t plan on gripping them at all. That’s asking for a bite. Unless you plan to just trade hits with them until you win? I’m thinking more of a stomping/kicking/striking strategy to do some crowd control and try to keep them off as much as possible.