Help on Tarkin Capital Ship Tier 5

For 6 star challenge, I had Tarkin's ship at lvl 85 and maxed on abilities (he's my fleet arena leader), then had both tie fighters (no Vader tie) at lvl 75, Sun Fac at 75, Slave 1 at 80, and Genosian Soldier at 75... only other DS ship I had in reserve was Gen Spy, but only lvl 40. I beat it on first try so I'm not sure what strategies work better than others, but this team smoked the opposing team easily. I believe I had all of these ships at lvl 60-70 for the 5 star challenge and Tarkin at 75, so that is the best I can think of to help. Even though the Tarkin challenges were easy for me, I cannot, however, come close to beating the other 2 capital ship challenges.