Sunsingers had everything you just said done to it. Firebolts and solar grenades are completely useless, the flame shield melee won't save you in a melee fight because they melee before it even appears and your dead, self res just give the enemy team another kill, and the only saving grace that the subclass has is fusion grenades. Every super in the game will destroy a sunsinger in less then one second examples being one shot from golden gun and hammer or being suppressed by tether or wasting a super to pop a bubble or rush in and lose to the guy who has more armor after being suppressed by said bubble man. Fighting a blade dance is a trade if you pop it from a distance and if you pop it close they will two shot you mid animation. A storm caller can easily win if it keeps its distance and zaps you. Nova bomb and fist of havoc should one shot it and so should a suncharge 👍