My first attempt to make Swarm Leader work was with Oicunn. It looks good on paper but I never got it to work well on the table and have since settled on QuickDraw and Vessery as my imperial swarm leaders.
Anyways here's the list, it's fairly simple how it should work:
(58) VT-49 Decimator: •Captain Oicunn (42)
•Experimental Interface (3)
•Swarm Leader (3)
•Ysanne Isard (4)
•General Hux (5)
Inspiring Recruit (1)
(42) 2x(21) TIE/FO Fighter: Omega Squadron Pilot (17)
Juke (2)
Pattern Analyzer (2)
Total: 100/100
In practice I found that the issues of focus fire on the leader, lack of endgame, and not enough feeders as mentioned by previous posters (along with the Deci always doing large base 2 Banks) crippled the list all to often.
My most successful Swarm Leaders tend to have at least three feeders which helps to mitigate the not enough problem just by having extras so I can lose one before firing. More feeders also gives a decent endgame if my opponent focuses entirely on the leader, this part works better the cheaper the leader is because if I trade a 36 point QD for half of the opponent's list in the opening pass then I'm probably still in a decent place. In this respect a major problem with using a Deci is cost.
Edited by nitrobenzPrice fix on TIEs