AbilityPhaseGateCapital (Antorak's phase gate ultimate), AbilityMissileBarrage (Marza's missile barrage), AbilityBuffBlast (Radiance Cleaning Brilliance), AbilityDisintegration (Vulkoras Disintegration).

Off the top of my head.. it's in the buff files themselves, not the ability file:

isInterruptable TRUE
isChannelling TRUE

As in, the casting ship needs to sit still to channel the ability that does something (like damage) over time. That means it can be interrupted by phase out/other ship disabling abilities.

Cleansing Brilliance is a channeled ability, for example. It shoots the beam for 8 seconds, and each second does 250 damage. If the ship moves or is interrupted early, only that much damage is done and the ability stops.

Now that's interesting

Yeah its gonna be channeling for both so its only one at a time... or neither if preferred