[Taqwus]

Penetration might be pretty high.

Bear in mind, 'tho, that there are assorted personal instant-death spells, such as Soul Slay, Petrify, Disintegrate, Magic Duel, Opposition; as well as delayed-death spells like Maggots and Decay; and spells that come close to instant death for many, like Incinerate. If it weren't for a penetration bonus, Paralysis would be weaker, since there's still a chance of surviving.