again if you pick a kol - radiance or kortul your bound to lose, i've never been able NOT to blow up the combat capship
for TEC the best ship-buster definatly is the marza, medium life, but longer range, frontal firing system, and few of the best offensive abilities in the game
Advent, Halcyon carrier, for its energy aura, wich increases rate of fire for all energy weaopons (did you know advent love energy guns???)
Vasari, definatly space egg, nano dissasembler pwns everything in front of it, and drain planet = superb in mid-game for those extra credits to fund the war-machine, every 3 min 450 of everything (thats about x2 what u would make normally)