I would recommend SK, Defiler, Templar, Illusionist, Troub, Warlock. This is pretty much the best caster group you can assemble and the most survivable. I believe this is THE Raid MT group.
This is almost the exact team I'm planning to try for my Freeport/Neriak based team. I was kicking around the idea of an Inquisitor rather than a Templar and a Coercer rather than an Illusionist - simply because those are the "evil" versions of those classes and I'm currently already playing a Troubadour and Illusionist.

Do those classes (Inquisitor, Coercer) work significantly less well with this team?