As you can see, even Harbringer(nearest equialent to RP) also have LL bonuses on top of this.So, my suggestions:
Add another universal bonus like DA or etc.
(OR) Due to overall weakness Arcanist-based classes(battlemages,warlocks) to other maybe better to be RP to work like Spectral Wrath, though in much less values in RR(15-20%).
You left out the Aether damage on Reckless Power. Burn duration can be worth considering too on Burn Sorcerers but it’s more niche.
Edit: Just examining what the skills do in a vacuum is pointless if you’re not looking at what the builds that use them as a whole have/need. For example, Krieg Battlemage will take Reckless Power, does it need more DA? Probably not.
Right, forgot about Star Pact’s CDR. It would help to say what kind of Sorcerer you tried though, Reckless Power is still arguable for Aether CT for the extra damage (Agrivix means you’ll always cap casting speed so that bonus is moot).
Krieg Battlemage needs lots of things,DA is not one of them.
Reckless power is decent skill for aether auto attacker or CT,because of flat damage.But HoS provides Attack speed and AdctH on top.For aether casters you need it,since star pact convert your damage to cold.Sorc is probably the only class that have some problems,since Demo don’t have fire or burn exclusive skill and takes star pact.Still not sure how to change it.
Are you trying to tell me that a build with basically no % Weapon Damage and only one spammable skill (in the form of a component skill) benefits more from Cooldown Reduction than Flat Damage? Who could have possibly foreseen this!
Reckless Power is plenty powerful, but hey, if you want to make it even more bonkers, go for it.