Hello everyone, I am new to the forums here. 
I have had a persistent problem when playing against the Vasari.
I started the game with me (TEC) and an advent ally vs. 2 vasaris. All AIs are on hard.
I build up my fleet, max out all avaliable ship slots I have a massive fleet with 3 Kols, 1 Dunov, 1 Carrier, and 1 Akkan, and 1 Dreadnaught. So I am stuck in a galaxy with one of the Vasari AI's. He decides to attack one of my border naval bases (Lots and lots of gun batteries muahahahahahah!! ) and he sees my fleet, gets scared, and retreats.
I decide to follow him up. I have nearly 80 Cobalts, 40 LRMs, 30 Kodiacs, 20 Repair Cruisers, 20 Command Cruisers, 8 Light Carriers, 2 Kols, 1 Dunov, 1 Sova, 1 Marza, and 20 Gardas.
I chase the Vasari fleet to his planet (and my culture has spread there) He has ~30 Ravastras, 30 Squadrons of bombers, 27 Squadrons of Fighters, ~ 38 Lansurak Light Carriers, ~20 Stilakus Subverters, ~30 Overseers, ~25 Enforcers, 3 Carriers, 1 Desolator, and maybe a few more ships im forgetting.
The battle gets underway, I outnumber him. Then he does something that he has always done every time and defeated me, he disables over half my ships!!! It says everything on them is disabled!!! I am so frustrated because I dont know a way around this. I was wondering if you guys could help me with this.
Also whenever I target one of his ships with combined power (I tried doing this with the desolator) I nearly destroy it then it suddenly starts getting ALL of its health AND shields back, and I can only chip him to 97% until it repairs again to 100%.
How do I stop the Vasari ships from disabling mine, and how do I get around that dumb repair ability? I dont even know what ship to target to stop this ability use. I would appreciate any help because he has a massive advantage over me right now because I cannot destroy him. Maybe im forgetting something somewhere, and yes I know im a newb at this game. 