I beat a Max HT with Vader's DOT, I would say 2 of 3 times.
A Kraken in my fleet uses Sith Fighter, Vader, HT - reinf Biggs, Phantom, Ghost, (I dont know). This strategy takes advantage of the slow ships (Vader, HT, Sith). I have not tried this with other ship combinations as there is only one max HT in my fleet.
All my ship abilities are maxed including capital ship
I use ITF, KRU, Biggs, -- reinf Vader, Phantom, Ghost, (battle ends at 3rd reinf).
1. ITF special on HT. Prioritize evasion over TL chance. Dont attack others, HT will gain TM and will taunt. Use Tarkin Basic instead of Ion Cannon to hit only HT.
2. KRU basic on HT. Great if stunned, lowers winning chance if not but still doable.
3. Biggs any attack on HT. Basic is recommended to land TL before Vader comes.
4. Call Vader, basic on HT. That should give HT 3-5 DoTs depending if he had TL before Vader basic.
5. Opponent calls Biggs. Attack Biggs even though he has retribution, you must kill him. Exception is KRU, basic on HT to stun.
6. If ITF is still alive, special on HT for buff immunity, at this point the DoTs have put HT to low health.
7. When Biggs is dead, you will be able to finish off HT.
8. Call Phantom Special attack. Call Ghost, debuff special if opponent has 4 ships; or 3 ships with at least 2 debuffs...otherwise Static Jammer.
9. I am able to finish them with Imperial Assault