Across all game modes the majority of POF spec's absolutely dominate HOT spec's in all aspects of the game,
Holosmith dominates scrapper in fractals and raids and pvp
Spellbreaker dominates berserkers in fractals raids, pvp and wvw
Scourge dominates reaper in fractals, raids, pvp and wvw
Firebrand dominates dragonhunter in fractals, raids, pvp and wvw
Weaver dominates tempest in fractals, raids, pvp and wvw
There are maybe two exceptions to this list with chrono dominating mirage in terms of fractals and raids with boon share, and druid being used as a support spec in fractals and raids, and you could say daredevil also but this is a pvp spec that see's little use in fractals, almost non existent in raids.
Why do the PoF specs dominate so hard and why are the HoT specs being left behind..