After running a few flashpoints on my two characters, I notice that despite a few exceptions, the majority of the FP item drops seems to lean toward usability by the characters I am running.

ex: Sith Assassin with Agent tends to drop all willpower items or all cunning items. If running a bounty hunter, more aim items drop.

Anyone have any idea when this is decided? Is it triggered upon opening chest, or upon attacking the enemy, or even upon entering the zone?

The reason I ask is because I'm after certain pieces of armor for my BH, that are actually Warrior pieces (I just want to swap out the mods) I actually don't play a warrior right now, so I am wondering how I can influence the drop of warrior armor.

So I'm wondering if I made a warrior
Ran the FP with my other two characters
defeat a boss
log out one character, log in the warrior and enter FP,
then open the chest, what will happen?

if no one knows ill probably test myself and let you know the results, but I just wanted to know if anyone had done any similar experimenting first.