If youre planning on using a borroco and still want to use 8.33 refire rates, the Barrager Mk III (level 6 junker photon cannon) has the same stats as the GMG Sunblast A, except its projectile speed is 600, matching the borroco. If you want more power though, Pyros IIIs are your best bet for pure damage. Angelitos offer a better energy efficiency, but I prefer the Pyros for the higher damage.
My setups are usually one or the other of these:
Pyros Mk II or Catapult - l5
Borroco - l5
Pyros Mk III x 2 - l6
or
Sunfury 1 or Catapult - l5
Borroco - l5
Barrager Mk III x 2 - l6
My setups are usually one or the other of these:
Pyros Mk II or Catapult - l5
Borroco - l5
Pyros Mk III x 2 - l6
or
Sunfury 1 or Catapult - l5
Borroco - l5
Barrager Mk III x 2 - l6