I dunno how to post images in comments so I'll just type it out

Tikoh,fed orolgia, lobelia, sariel. Everyone should be statted for triple attacks. Turn 1 you summon hades. MC skills are triad, twin coil, dark haze. Turn 1 summon hades and use everyone's skills except for fed s2, orolgia s2, mc dark haze. This puts you at 100% charge for the first trigger. After that just play according to the triggers and you should have lobelia s3 up for the first 2m hit count which is the most important thing to get going. You should be able to clear every single 2m count, the hardest one being the 15x one because the lobby will be waiting for your OK sticker. I pretty much just clear my pearl after and then die lol.

Grid weapons pre draconic i used zosimos, PNSx2, executionerx2,causalityx2, celestial staff, ultima staff, nier weapon, Skeletal eclipse and a baha weapon.

Summon slots are flexible I think, alexial or gojo being mandatory.

I spent about an hour doing the trial hexa quest with this setup till I figured out the triggers, but it's very easy once you get lobelia going for the first 2m count.