If you want, there's always the Pest Control mission that TAC has up. I've signed Cotan up for it as part of a "Test to make sure he's ready to be a Knight" thing, and Terris could always join him there.
Apparently Cotan had been on the short list for the list of promotions this time around. Once I prove that I'm going to stay active for a while and complete a mission with him, he's probably being Knighted, finally.
The funny part will be him getting knighted before finally making another lightsaber.