As TEC, early-mid game, a single Kol with two Hanger bays can hold it's own against a mucg larger force. I just played a 2V2 with comps, was attacking one and the other attacked one of my core worlds, since I had a Kol close I sent it in, it held off A Dunov, another Kol, 20-30 Percheons, and 15 LRM's with only the help of three repair bays (6 Tac slots to hold off an entire fleet), my main fleet comes back and wipes the floor with them as they're retreating thanks to my PJI. Just look at it this way, turrets are deterrents and meat shields at best, Hangers stop Siege Frigates and help in defence if the opponent doesn't have flak, but repair bays turn the tide of any battle, even if they're just the ones you retreat to because your Flagship is at less than 1000 hull.