Good strip, good strip. Love the tension building up.
Besides the chance she just got unlucky, as a high level cleric she probably got tagged as a priority target and had to save against multiple dominates.
V meanwhile is the squishiest party member once the buffs are out, so the vampires are probably confident they can finish him off the old fashioned way (in particular if, say, Belkar starts stabbing him).
Hey, original-party-member-gone-to-the-dark-side is at least B-list boss!