Um Ino.... because she can quickly use mind body switch, she has sensory techniques, makes a great spy, can use medic ninjitsu, and she is actually somewhat good at hand to hand combat.
Karin, can fully restore you depending on the amount of chakara she has and is a very talented sensor type/strategist. But other then that she is average at best. So she is useful but not in a battle way, but in a tactical group.
Karin, can fully restore you depending on the amount of chakara she has and is a very talented sensor type/strategist. But other then that she is average at best. So she is useful but not in a battle way, but in a tactical group.