I'm struggling to understand why you think "you won't need the 2s immobilize". It's an excellent thing - in huttball it forces flying people straight to the floor, stop them on fire, stop before a goal line - everything. It's always better to have a stationary target than a fleeing (even slowly) one.
I'll throw up a build when I actually decide on one (which will be when i hit max, 2 levels to go, whoo)