RogueLeader thank you for your ideas! They are perfect, just the kind of input I was looking for.
EDIT: and don’t hate yourself.
DOUBLE EDIT: And according to the comics I believe none of the KoR were Jedi students; they were basically an outlaw gang with a leader named Ren who was not Kylo Ren. Just. Plain. Stupid.
I’ll depict them as if they were all students and turned to the dark side under Kylo Ren. I would love for someone to vfx one of them with a lightsaber; but even without that I’m ok with them forsaking the Jedi/Sith traditions, including lightsabers. It makes sense for their gang and is one more wedge between them and Kylo Ren.