The is no easy counter unforunately. The cobalts have sabatoge reactor, which disables abilities, and the Cielo can help you destory Guardians quicker with LRMS.
The best thing I've seen work so far, and understand, I'm saying that the TEC don't have a good answer, is to Make 3-4 kols's and have them target the Guardians. They'll never stop firing at the Guradians and the rest of the fleet, and Kol's are incredibably hard to destory, so if he does manually target one, you can retreat and heal it with a Hoshiko and give it a sheild boost from a dunov.
Really, to beat repulse, you need to out macro your opponent. Bring in a huge ass fleet because of your superior economy. That's how you beat repulse, well, at least as of the moment.
O, and to beat a dead horse, repulse is broken.