tactical officers are kinda useless withou a good crowd control team, but there is one very cheap solo tactic that ive seen them do
stay in stealth and only come out when its 1v1 or when you have a chance to shoot them in the back whilst they are distracted, make your first shot from stun pistol followed by all the other Expose skills you got, if you have the time try to get an expose from melee, if you land an exposed, stay and fight, if not, spawn your security team and then stealth away and try again.
if you time it properly, you can use stun pistol then melee then stun pistol again and again, keeping them stun locked untill you get an expose, very cheap.
Too many holds + the whole expose/exploit mechanic makes for some frustrating PvP I agree.
On my Science guy, I have one hold and something like five or six expose attacks (weapons not included), most of them AoE. I don't even bother to shoot people, I just mash Tachyon Harmonics, Stasis Field, Hyperonic Radiation, Tricoder Scan, Neural Neutralizer and the Nanoprobe thingy until someone gets exposed then I do a double Split Beam Rifle attack. People die, yay me.
It's effective but not that fun honestly.
The worst thing is that it negates any skill involvement ; sometimes I find myself in a tough situation with low HP or against a guy who's just plain better than me but I just get an expose proc and it doesn't matter if my enemy actually deserved to win, I get away with another one-shot kill under my belt.
The whole "let's spam rifle butt until expose" is also a magnificient strategy, I seriously cannot understand how this thing isn't on a cooldown already.
And let's not even get started on ground weapon balance, the fact that 99.9% of the high level ground PvP players are exclusively using Split Beam Rifles is surely a coincidence, right ?