Disruptor or Anti-Proton. Disruptors benefit everyone on the teams DPS, antiproton can get some insane criticals going especially with the boost to crit chance from Tachyokinetic Converter/Zero-Point/Borg Console, or if you have all 3 of them equipped at once, even better.
I use Polaron on my Science captain with a power drain build, everything else is either disruptor or anti-proton. At end game there really is nothing better.
All those generators, transformers, and gateways in STFs? The Tetryon proc is 100% useless against them. AP's bonus crit severity is useful against everything.
True that the proc may not affect everything, like the items mentioned above are not affected by a shield stripping proc that Tetryons have.
That's just their proc. Otherwise they do as much damage as all the other energy weapons. Get Tetryons that have the same crits (CrtD) as Antiprotons and you'll have the equivalent weapon but with an proc as well.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Are you sure it isn't time for a "colourful metaphor"?
--Spock in 'The Voyage Home'