So I was testing around Hallowfire Heart with its recent changes, figuring that with the Exotic Perk and Sunspots combined, I could reach almost Transcendence ability uptime with the right setup, but on a Solar subclass! However after numerous Shooting Range testing I can only confirm this: The Exotic's perk, which gives you more ability energy regen for melee and grenade when your Solar Super is charged, does NOT stack with the ability regen provided by Sunspots. The cooldowns on both my healing grenade and consecration were both around 14~ seconds, while in a Sunspot and without one. Now this might just be getting it wrong- maybe Bungie's idea was that this exotic's perk can be always active- without super, but just sunspots, or just super ready but no sunspot, but I just feel like with the way they described it, and if they want to make it a competitive option to use, these buffs SHOULD stack, right? I mean... Just use Heart of Inmost (or it's spirit) otherwise for a better effect without needing a Solar Super.