Trust Spell Limitations

Can anyone tell me what limitation there are with the trust spells?

ie can't use it in BCNM fights/ certain zones.
NPC despawns when zoning etc..

Thamks.

Trust Magic Restrictions

Locations Where Trust Magic Can Be Used
Trust spells cannot be cast in cities or locations where there is specific battle content*.
A message will be displayed when attempting to call forth an alter ego in an invalid area.
* Applies to Dynamis areas and other areas and instances where battlefields, Campaign, and other similar content occurs.
* The scope of available areas may be expanded in the future.
Party and Alliance Restrictions
Alter egos may only be summoned while solo.
* Players who have summoned an alter ego may not be invited to parties or alliances.
* Alter egos may become available in parties and alliances in the future.

Number of Simultaneously Summonable Alter Egos
As of the February 18, 2014 version update, up to three alter egos may be summoned at once.
Unlike pets and fellows, alter egos are considered party members.

Using Alter Egos in Reives
Alter egos may be summoned in colonization, lair, and wildskeeper reives, but they will not receive momentum bonuses.

Summoning Multiple Copies of the Same Alter Ego
Only one alter ego of a given NPC may be summoned at a time.
Trust Spell Recast Time
Each Trust spell has its own recast time, and hence a given alter ego may not be re-summoned until the requisite amount of time has passed.

Summoning Alter Egos in Combat
Alter egos may not be summoned while the player is engaged in combat.

Dismissing Alter Egos
Alter egos will vanish upon logging out, changing zones, or falling in battle.
They may also be dismissed manually by selecting "Release" from the action command menu.

Go go kirin solos!

I don't know if it's a bug or not, but you're not able to solo them inside the Garden of Rhumet (sp?), but I didn't check the palace. Was kind of surprised when I went to kill Ix'DRK last night and it wouldn't let me summon them inside. You CAN summon them outside in Sea, though. It seems a bit odd and possibly a bug since you can summon them anywhere in sky, including inside. Go go kirin solos!