i guess you are pretty new to the game?!
i dont know much about the TEC or Vasari CAPs, but the combination of different Advent CAPs is very strong.
so has the combo of radiance (cleaning brilliance) & "colonyCAP" (malice) been nerfed several times, but it has still strong syngeries if used at the right moment.
another strong combo is the radiance ("force enemy ships to attack radiance") & (i guess the name was) rapture (retaliate).
often are the CAPs weak and only a good combination with other CAPs, cruisers and frigates unleashes their full power. it also depends on your style of play which ratios are good.
i, e.g., built a ratio of 2 radiance : 1 "colonyCAP" or 1 radiance : 1 rapture