My guess would be Mithril Wristwatch since INT has a 1:1 SP conversion.
Don't know if anyone has done research/analysis on trinkets yet but i have found Wristwatch and Alchemist stone to be by far the best two trinkets pre raid. Mainly because they both have a 45 sec ICD which along with the short ICD allow them to consistently sync with each other quite nicely.
I would put Vision of the predator in front of Flashfrozen Resin Globule since Vision has a 2.5min CD (this is merely speculation though and not fact). This is also under the assumption you are hit capped, which is not difficult to reach in close to full 463 gear.
In Short: Wristwatch > Alchemist Stone > Vision of the Predator > Flashfrozen Resin Globule