Nightwalkers. A primitive soldiers, nothing else. A cabal power? I suppose, characters (not players) do not se difference between player and NPC.
And, you don't run army. I know. But why do you allow warriors inside, if so? They are warriors, and their job is to fight. Their primary stat is strength (rarely dexterity). They do not use magic, most of them do not know even how to scribe. And you want them to be... to be... what do you want them to be? A mage? A researcher?
To me, you are making organization, similar to the army of archers, unprotected by the swordsmans, who stands on the battlefield against a good and complete army. They will tear your archers apart, depite some loss.
IMHO, you overestimate players and demand too much from them. They are players, and they like fun. Not permanent torubles. Besides, you never ever told me, or someone else whom my character knew, what do you want from them. Just purged cabal, and hands off. Ah, hell with you and your cabal.