I'm just gonna come out and say it. I've spent a lot of time playing Sunsinger and I feel like Stormcaller just generates orbs more consistently and more often because of the options to reduce super dramatically, even if it drops less orbs per super. Pulsewave is flat out more effective than song of flame, especially in public areas. That agility boost saves lives. People in the public either have no idea what Sunsinger does or does not have a way of knowing to group up to get their cooldown reduction. Combine pulsewave with electrostatic mind and your team just owns, no thought or timing required. Public users don't have to know to hang out by me, I can just go to them. For PVE, sport those impossible machines and landfall along with superconductor is just ridiculous adds management and even a boss killer. I really love Sunsinger, and Voidwalker is a fantastic class, too. Even though Void is much more offense oriented, Hunger builds or Nova Bomb builds are so effective that it gets kind of frustrating when I go Sunsinger and don't get kills ahead of my team while in radiance because grenades are nerfed, and if I opt to shoot things or run a sword, I'm still competing with the team to get kills. When I run Stormcaller I can just feel my fireteam at ease and the public players just enjoy the ride. The Lightning!!