They still assault with Slow and Purposeful. They don't get +1 attack for charging either.
Your biggest problem was throwing your Daemon Prince against the Chaplain. The Daemon Prince should be hunting things such as Devastator squads, Predators, Land Raiders and the like. The ONLY characters I throw my Daemon Prince against are the ones with Toughness 3, or with a lower initiative - characters such as Autarchs, Farseers, Archons, necron lords. He's a fear factor and something to rid those things quickly - not an uber-Chaplain killer!
__________________ Lurking in the Shadows of 40k Terra. |