For me, trying to learn Imperials, Dengar is a godsend for my TIE swarm. I don't like to dump more than 70 points or so in squads, so I focus on a prevent fighter screen.
But the Raider and MC30 are still my tied picks for biggest change.
I keep going back and forth on Dengar.
He's great for making the TIE investment more worthwhile, but he naturally wants to stack with Howlrunner, and once I've paid for both of them AND enough TIEs to make them shine, I feel like I don't have the points for a reasonable bomber investment.
Either that, or I look at the option of taking anti-squadron exclusive squadrons and lose my enthusiasm.