I'm not sure if this has been mentioned yet or not but I'm going to contribute something interesting I just noticed. If you are fighting a mob and change your target, tank job trusts will voke that target if it's in range. I had both Trion and Volker do this but I'm pretty sure it's the same for all of them. To be clear I did not attempt to engage the mob I switched target to, and it had not aggroed, it was simply in voke range. The tank's melee target remained the original mob, but each time I would change my target to the other mob, without engaging it, he would voke it if his timer was up.
This is a great tool, since you can get have your tank trust hold an add for you without having to put yourself on the hate table.
Hope this was helpful!