Symbiote is the best GG helmet. N' hawk may be best for pve but wouldn't you want to be using nightstalker subclass making the helmet reduntunt?
Heart of the praxic fire may be the best sunsiger exotic but that's not saying much and besides it not even that good. That being said xur can only bring what's in his inventory and he's brought the best available. (Arguably)
There are certain sections in the game where a 6x GG bullet is ridiculously handy. Especially in some of the higher level PvE content. In most scenarios I will run Nightstalker though.
Symbiote didn't get a year 2 version so is useless for IB/Trials. Also Xur isn't going to sell that bad boy again.
And the Imm fists Are no ruin wings / saint 14 that's for sure.
All in all: alright/10
give me double grenades any day. (Is the chest piece a y2 exotic? If not may need to pick something up for IB)
Alternatively Immolation Fists are probably the best Sunbreaker Titan Exotic for PvP. Ruin Wings have no effect in PvP so they aren't the best to take in.
Armamentarium didn't get a Y2 edition either so no more double grenades in Trials/IB.
Actually anything that was predominately PvP based when it came to Exotic Armour was left behind. Lucky Raspberry, Symbiote, Nothing Manacles, The Ram & Armamentarium were purposely left behind to change the meta.