How has Tony been "meddling" in the affairs of the Ten Rings....?
*They* started it. Stane hired them to kill Tony in Afghanistan, and Raza drafted him to build a weapon for him instead. That backfired on him and he got punished for it, by Stark *and* Stane.
And how would Trevor convince Tony he doesn't exist when he splatters himself across every TV and newspaper in the known world? That's the exact *opposite* of subtlety.
And where did you get power as Killian's motive? I don't think you understand that character at all....