Heyo, as there are so many people asking about trinkets, I thought I'd chuck my little notepad thingy up on here. Keep in mind that it uses my own scale factors, in my own gear. It won't be exactly the same for you, but it will show us a littlebit of information about how trinkets are for fire spec.
Feel free to add your own tidbits of information. It's much appreciated.
Zen Alchemist Stone:
With an internal cooldown of 55 seconds and its proc lasting for 15 seconds, the proc is equivalent to having a maximum of:
4561*(15/55) = 1243 Intellect
+451 Mastery (300 Mastery > Hit)
1243*3.78 - 4698,54
300*2.36 - 708
451*1.34 - 604,34
Total: 6010,88 (5896,88 if reforged to crit and not hit)
Vision of the Predator:
With an internal cooldowns of 105 seconds and its proc lasting for 30 seconds, the proc is equivalent to having a maximum of:
3386*(30/105) = 967,43 Crit
+847 Intellect
847*3.78 - 3201,66
967,43*1.98 - 1915,5
Total: 5117,17
Light of the Cosmos (normal):
With an internal cooldown of 45 seconds and its proc lasting for 20 seconds, the proc is equivalent to having a maximum of:
3236*(20/45) = 1438 Intellect
+1079 Haste (431 Haste > Hit)
1438*3.78 - 5435,64
431*2.36 - 1017,16
548*1.36 - 745,28
Total: 7198,08 (7034,2 if reforged to Crit and not Hit)
Relic of Yu'lon:
With an internal cooldown of 50 seconds and its proc lasting for 15 seconds, the proc is equivalent to having a maximum of:
3027*(15/50) = 908,1 Intellect
+956 Intellect
1864,1*3.78 - 7046,29
Total: 7046,29