Is luck a classic trait for a Human? Then, rather, it's attack. And the last one – education/logistics.
Well, theoretically, if vampirism drops in a town, then Darkness will be very effective. In combination with a bunch of trained paladins. And then you can take acceleration not in light magic, but in attack, take "magic of speed." But there are risks...
The opponent will counter with knights, gargoyles, or golems, and no amount of vampirism will help. Mass stone skin or mass evasion look more appealing.
