As a returning corsair, you'd probably want to use the leveling combo below for farming in Reisenjima
...because you're probably not going to be doing much else unless you're absolutely incredible on cor and plan on subscribing again.
Seeing how this thread went unanswered for almost a month, it looks like we're just hi-jacking it into a general trust thread for everyone else.
AAEV, Kupofried, Iroha II, Shantotto II, Yoran for leveling.
AAEV, Amchuchu, Cornelia/Joachim, Koru, Yoran for soloing merit avatar prime fights.
AAEV, Corn/Joach, Seltheus, Koru, Yoran in that particular order for safely soloing Quetz. If you're not cool enough to be a dragoon, swapping AAEV for Uka Tothlin is np. The only issue here is trying to chain faster than AAEV/Seltheus/Uka *** up your skillchain. That and you're going to be tanking for about twenty minutes solid.
The order in which trusts are summoned is kind of a big deal.
Trion, Curilla, Adelheid, Maat, and certain others like Rosulatia, depending on day/time/weaponskills/magic elements, are Abyssea proc champs.
Unfortunately, AAHM ruins the ***out of everything with 10k CDCs instead of spamming ninjutsu.
Say, for example, you were farming the hell out of Shinryu on thief and it was 6:00-14:00.
An ideal setup may look something like AAEV, Shikaree Z, Semih Lafina, Qultada, and Yoran.
AAEV, Corn/Joach, AATT, Koru, Yoran for soloing orb fights, or multiple targets that need slept.
Kupofried, Corn/Joach, Koru, Yoran, Qultada for four/five stepping the ***out of Apex mobs.
If you're able to tank them with trusts.
AAEV/AAHM, Kupofried/Tenzen II, Iroha II, Koru, and Yoran is a good combo for soloing Apex mobs on summoner.
However, waiting for trusts to skillchain for summoner bursts is like waiting for the cold hand of death to sweep you from the face of the earth.
(
There's clearly a theme here.)
Some trusts have unique issues that will likely never be fixed.
For example:
Yoran will always try to run like 20y away from any mob that attacks him; which may sometimes lead to him never stopping and never healing.
Same with Tenzen II; his AI will attempt to stand at true range and may bug out in a way that prevents him from attacking until you disengage and re-engage.
The hit-box issue with large wyrms:
AAEV and August may never stop moving, making it almost impossible to use trick attack on them.
Naga Raja's hit-box can cause Yoran to run into an area of the arena that will line-of-sight him from your party, causing him to not heal or use -na spells properly.
Always engage giant wyrms directly from the side with trusts, especially Ouryu; where you'll want to arc around his aggro range to the right of the arena until you hit a point where he engages and starts spinning his entire model. When this happens you need to carefully sidestep to the left while locked on until he spins back to his original position and then close in on him. You may need to disengage and reposition your trusts during flight phases to keep them from being flailed or breathed to death.
Same with Quetz & friends: If your trusts are standing directly in front they will more than likely get melted by sable breaths.