The Omen is rarely deployed due to the cost associated with maintaining such a technologically advanced ship. Its excellent shields and the EMP Emitter it carries make it a perfect escort for larger ships.
In truth, the ship should be built around the EMP emitter being treated as it's Primary weapon - It lacks enough hardpoints of any type or size to carry a significant loadout otherwise. Given the range of the EMP emitter, short-range weaponry is advised to encourage the AI to pilot the ship near to enemies where the EMP arcs can wreck havoc once activated.
Owing to it's pathetic armour and hull values, boosting it's excellent shield strength via Hardened Shields is recommended to avoid it needing to drop shields to tank shots on what little armour and hull it has.