Yeah, but, even Ulzuin sorcs use it, although a lot of CB’s damage comes from burn. Same deal for Pyran, where % fire seems more valuable to me due to amount of flat fire dealt per second.
I mean, every other exclusive grants super useful stuff like crit dmg, resists, dmg absorb, OA, ADCtH, and CDR. Reckless Power, on the other hand, provides fire and stun retaliation of all things, which are mostly useless (far as I’m aware, even Turion sorcs use Star Pact). And this makes RP the weakest exlusive despite its name.