Regular elemental bolts would be easy. I still have some leftover Omega poison, which can both poison and act like regular corrosive acid, which I can add to some bolts. Fire, lightning, and ice bolts are easy, due to regular enchanting. Although remember, not all will do their fully intended job; like ice will not fully freeze a target, but at least immobilize part of it for a while. The EMP-like bolts you were talking about could also be made. I could equip them with a small EMP that detonates upon contact, rendering all electronic mechanics useless temporarily (emphasis on temporarily). I could also equip then with regular flash charges that could blind for a very short while. A sound wave disruptor could be implemented to mess up any transmissions or sound carried attacks, but not customized enough to disrupt spells.