For the antoph i was thinking this:
Antoph Light Cruiser - Raid Priority
Speed: 7
Turns: 1/45
Hull: 5
Damage: 38/9
Crew: 42/10
Troops: 1
Craft: none
Specials: None
In service: 2175+
Weapon/Range/Arc/AD/Special
Graviton Beam/18/F/2/Beam, DD, SL
Grav Cannon/18/F/4/Precise, SAP
Graviton Pulsar/12/F/2/AP
Graviton Pulsar/12/F/2/AP
Graviton Pulsar/12/F/2/AP
Graviton Pulsar/12/F/1/AP
Gravitic Bolt/3/t/2/AF, Weak
It's similar to a Narn Katoc in that it has great firepower forward, but it sucks in ever other arc, and against fighters.
as for the Corumai..... well, it's big. the model, roughly in scale, to an Avioki, is about 2.5 times the mass of a Brokados easily (in FA scale) it's probably a little bigger mass-wise then the FA-scale EA Poseidon. none of the art i can find show any of the 9 Gravitic beams, so I'm going to take a bit of licence with that detail-wise on the model.
here are a pair of drawings i found of these 2 ships on the net.
Antoph
Corumai
enjoy.
Steve