They die too fast, Stack behind the tank, don't heal for mp, you have to engage for them to fight. I'm not expecting these guys to carry me all the way to Omen job cards. But they should be a lot better than this. Here's what I think needs to be changed.
1.) Add "Trust movement commands" - these are like abilities, you stand on the spot and target a Tank Trust NPC and click a command "Fight Here!". Or How about "Heal here" command to target a Trust NPC Mage that's low on mp so she can run to you and /heal for mp till he/she is full. Or a "Only use Ranged Attack, Magic Attack from here" command to call mage NPC's to stand on a safe distance and nuke there.
2.) Add Trust Gifts on acquiring job points increasing their ilvl by 1,3,5,7,9,11,13,15,17,19,21 levels above your current ilvl.
3.) This is probably the most important, let us re-summon them if they die while in combat on any combat event like in Reives please.