Well, heres the video, i hope you enjoy watching it as i was playing it. It was very exciting.
So, a explanation of what i did here:
My party for this trial was:
-Rosa (MP battery)
-Refia (healer, revive, elemental chaining)
-Cecil (limit burst, chainer)
-Rain (Undermine, leadership, chainer)
-Exdeath (main damage)
-Friend Exdeath (main damage)
So the fight was like this:
Round 1: nothing here to see. undermine to belmodar, firaga, and only mantis alive. Rosa cast refresh so rain can recover mp. Then with both exdeaths dualcast firaga-osmose to recover lost MP (that is the key part of success in this trial)
Round 2: Same as Round 1.
Round 3: undermine to Roper, focus with cecil, refresh with rosa, and dualcast firaga. Roper dies and red flan almost dead. Next round i do firaga-osmose combo to red flan and normal attack with other to fill lb. Then double thundaga to kill green flan and yellow flan in danger. Finally combo of thundaga-osmose to always keep exdeaths with full mp.
Round 4: There the real trial starts. Undermine to flamesblade. Cecil Limit Burst, Rosa refresh, and dualcast meteor... refia normal attack to try to chain with meteors to do more chain damage. In any moment both enemies will buff at the same time (that happens in round 8 too), but Rosa has dispelga (thats the other reason i chose her) so i dispeled both and undermine again to flamesbane to kill him in the second round of double meteor. When hell's rider is alone, is easy to kill. I just make sure of keep all full mp thanks to rosa and osmose.
Round 5: Basically the same strategy of round 4 but more easy because Architeuth doesnt have a killer move like previous round.
Round 6: The relax round. Hell Knight can be killed with revive, so i make sure to fill mp and lb the most i can
Round 7: This one is though. Antilion can be undemined but Chimera dont. So i tried to kill antillion first. I casted barfira with rosa because Chimera uses fira. Again with a good planning, i didnt have even mp problems here.
Round 8: The hardest one here. Wandering one is the only one that can be undermined. Both enemies has big resistance and was a long fight. Dispelga again make rosa shine.
Europa Fight: The final round. The searchers can be undermined, so i do it to kill them fast. Rosa casted Barthundara so that and ramuh esper on both exdeaths make them invulnerable to Europa's thunder attacks. The fight was long, and my friend exdeath died so many times (and rain died 2 times... Rosa only died 1 time lmao) and i attacked with dualcasted thundaga and thundara with refia (i equipped her a thunder rod) for more damage.
Was an intense fight, but again, if you going to do it F2P, the whole party must be f2p, not "no tm!!!!, no base 5star!!!!!..... but a friend noctis roided as fuck!!!
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Sorry for no sound.
Please... can you gaf share my video with other players please? so.... i can have more views?
Thank you all for your help with your exdeaths. I couldnt do my research on this trial if it wasnt for you, thank you exvius-gaf!