[Snake]

I'd say not for grinding purposes, but being able to craft "Lures" or something from monster remains and other mundane ingredients would be a pretty nice thing to have. (And a good money sink for some.)

When you use a 'Lure', you can start a fight in a dungeon, or spawn a monster next to you who will attack you and scale according to the lure's benefits (such as making them spawn +10 levels higher than yours, or the dungeon level, etc.)

Ideally, those fights would not drop items nor Murai, only grant EXP.