This covers Death Strike and Lightning Strike. Instead of adjusting the damage to deathstrike just make it's mana cost cumulative with special moves. So when people spam special attacks and sneak in a deathstrike while doing so they fork over 40 mana instead of the normal 20. Seems like a good enough adjustment to me instead of destroying one of the best parts of the ninja template. Also put lightning strike on this list of cumulative mana costs too. That might make some of the OP sampires put HCI on there suits instead of solely relying on 100% HCI for what 4 mana?