This is the party I currently use for TLS:
I wouldn't say it is 100% ideal, but it works well enough with what I've got. Bahl and Korin's SB% are from them going through almost the entire story campaign together. Pupropu's SB% is a result of being a mage + the main enemy clearing unit when I was grinding 23-4 all the way until I recoded Samatha. Samatha Lambda's SB% got a 20% boost from recode. Calista is almost all from running the TLS event. Lol.
With the unit placement in this formation, on the first turn I use Korin to move both Bahl and Kapori up, with Bahl touching Calista (enemy) from the bottom, and I move Samatha to the right and then up, and I move Pupropu to the right twice, and then Korin completes the pincer at the top. That ends the battle in the first turn.
Then in the second battle, I move Calista from the bottom right straight across to the left (sliding Pupropu out of formation), move Samatha into the pincer slot in the bottom left of the enemy "square" formation so to speak, then I slide back right at the bottom row to move Pupropu back into the formation, and I quickly move Calista to the top left of the enemy "square" formation to slide the NPC to the left and I slot Calista above her. This usually allows me to clear all those birds in that enemy formation in a single turn. For the remaining two enemies I just flick Bahl and Korin to kill them depending on where they move. Sometimes it gets messed up though.
Beyond these two core movement strategies, the rest of the battles are mostly done on the fly depending on where my characters end up. There's too much uncertainty due to enemy movements to really plan that far ahead. But at the end of Battle 8, I always try to place Samatha right below where Mitra will be, and Bahl on one of the pincer locations for the enemy support units on either left or right. This lets me kill at least one of them in the first turn and get 2 elemental attacks on Mitra without a pincer (Samatha's Lightning Area and Thunder Column). The next turn I pincer Mitra with Samatha vertically and Pupropu in the mix, and that takes down the shield. if the positioning for my physical attackers are good at that point, I can kill Mitra with an Outflank pincer with Bahl/Korin/Kapori/whoever + a power point. If not, I usually just cry.
The final battle is mostly a matter of flicking to take out the minions as quickly as possible, and then double pincering the boss with Bahl/Zael/Korin/Kapori, with Calista on whichever side of the pincer needs more healing.
(I *think* I first got Zael before I recoded Samatha, so I had her on Job2 at lvl80, and the same strategy worked.)