My /Sonic Controller certainly feels like it does far more with its support set than my FF/ Defender.
Gravity/Sonic, runs 4 ally toggles on a Singularity and teleports it into the middle of every mob. Love it.
With this combo your Singularity does all of the following on its own: -res aura, damage aura, KD aura, absorb shield plus res shields, vacuum pull aura, FF proc, annihilation proc. Teleport target to drop all of the above anywhere.
Poisonous Ray and Sonic Siphon compliments all that vs bosses.