Yeah, I'm working on a cheaty semblance too, but the point is: if you can't isolate what the semblance does in a single sentence, you need to trim it down. 'Having a familiar' would be fine. 'Having a familiar that can provide support' would also be fine (although in both cases, said familiar would need to be rather lame, depending on the char's age and qualifications). But 'Having a familiar that can nearly function as a deus ex machina' is probably not fine.
I know, I've had problems with my chars before. Pretty much all of them. Heck, Nathan started with 'can manipulate kinetic energy', but that was deemed to reach too broad and was nerfed to 'can affect his own kinetic energy', or something close to that formulation.
All in all: do 1 (this is relative) thing, and nerf.