If you were under subscription while making this character, then you should have about 7 of those.
Best way to check it is to go to ESD and somewhere over there is Skill Trainer (not Boff one), when you start Respecializing, it will note you of how many you have.
If not, then it will cost you 500 Zen (about 65k Dil on current exchange rate), but you can do enough DPS with current setup, so no hurry, when you get to point where you'll go for C-store or Fleet ship then we can help you sort it out
Here is
my current build, you can ignore most of equipment and Boff stations, it is made mainly for PvP (not the best build, but great in last season of
War Games).
Important stuff is under Skill Tree.
To convert this build from PvP to PvE, I would only change "Starship Auxiliary Performance" to 0 points and distribute 3 more to "Starship Projectile Weapon Spec", 3 to "Inertial Dampeners" and one to either "Shield Systems" or "Structural Integrity".
As I said, this build is not perfect, therefore should not be blindly followed, but you can look at it as a guide to increase survival without much loss of DPS.
EDIT:
While writing this you've edited your post.
Yes, IMHO, Omega Rep has best ones, but that depends mostly on which part of End game you will play most.