Keep an eye out for any boost willpower potions in the Casino. 3 blessed potions should be enough to bump your Wi to 99 for a little while, which will make your ball spells that much more epic.
Note that if the vault design is the one where the liches are trapped in the center room, you can kill most of them without ever opening it by spamming high-powered ball spells next to the walls.
Hoping to win with every class, doomed. Archer, Barbarian, Bard, Beastfighter, Druid, Elementalist, Farmer, Fighter, Monk, and ULE Priest down.