I can confirm Requital's assessment that Gaze is close to 510 LSFO. I have it as well and my findings are the same. In addition, Simulationcraft shows that they are quite similar.
Here is a snapshot of a number of trinkets sim'd against my gear. 4pc t15 (522) along w/ 522 Wep. Each trinket is sim'd individually so this doesnt take into account how 2 trinkets interact with each other. Also note that FFoJ, PToR, and BTotSA are all reforged to haste and the hit/exp are entirely over cap and not utilized. Interestingly, I show PToR as slightly better than SoZ.
SimulationCraft Results:
Code:
FFoJ_522 : 133785 dps
PToR_528 : 132248 dps
FFoJ_502 : 131761 dps
PToR_522 : 131660 dps
SoZ_522 : 131004 dps
LSFO_510 : 130399 dps
GotT_522 : 130366 dps
PToR_502 : 129935 dps
BTotSA : 129886 dps
Relic_484 : 129295 dps
SoZ_502 : 129207 dps
GotT_502 : 128803 dps