Yes, you can attack with lots of other places, fingers, palm, feet, grips. Eagle claw for example, applies gripping for dim mak foremost. But we can't think in MMA terms and break dim mak into individual moves. The general answer for whether dim mak can work in MMA is no. You cannot view moves independent from the whole system. Take Eagle claw for instance, most of Dim mak moves are only applied under the premise that you are controlling the opponent with trappings and grips at the wrist. MMA gloves, while been much more maneuverable than boxing gloves, is still a big hindrance to any traditional MA gripping (most of which are at the wrist) and trapping styles to the degree that they are rendered inapplicable. Much of traditional MA strikings on weak points are also based on relaxed hands tensing up at the moment of strike, which is rendered powerless by combat sport gloves of any sort (gloves not only softens your knuckles, but it also structures your hand for specific types of punching, this protects your hand in boxing style fights at the expense of other types of strikes), the fact that gloves also soften hard and sharp parts of your hands which are used to strike soft points only makes it worse.
