Int is just another stat, some abilities or passives will use int to increase damage, healing, or other factors, it really depends on the monster
I would recommend trying out some of these monsters: Tizik For speed buffs, Urso for % damage and his evolved ability, Kabu for a good ability and passive, Scutter for great damage, Krog is a great healer, along with Hydrim, and Mudgill is also good for damage