Yeah with Lilliths there... I'd buy Warrior Lillith.

I have 3 Gunner, 1 Assassin, and 2 Magus Lillith.. .. Gunner and Assassin are both good buys as well. Magus is no slouch, but a single hitter as opposed to multi-hitter (Gunner, Assassin, and Warrior are multi-hitters... Sentinel and Magus are single-hitters)