I stumbled across an situation in game play that I didn’t know how to handle and I was hoping for a second opinion.
My PCs fighting a slightly higher level creature that they were gangging up on.
My Wizard cast Icy Rays and immobilized the target (granting combat advantage against him).
My Cleric cast Spiritual Weapon and attacked (this spell grants combat advantage as well).
Finally the creature was flanked.
now...is that a +6 to attack?? Or do these not stack because they are all combat advantage?
I erred on the side of my PCs and gave them the +6