Can anyone tell me how to beat the purple dragon in the trial temple?
Preparation:
Level up until you get "Gran Aura" spell for your main char and 3k base HP. Get Mysterious necklace from the Inn, War ring (+50 TP generation, sold in shop) and Ring of Vitality (optional) for your main. Get "Feather-light robe" for Yuno.
Strat:
Equip the war ring, Mysterious necklace and vitality ring on the main char. On Yuno, equip feather-light robe. That's all the gear you MUST have, anything else is up to you.
Your main plan now is to keep Gran Aura (covers Yuno, 50% dmg resist) indefinitely. You must have it on all the time, for that you have +TP regen ring and incenses. MC should only use Gran Aura, regular attack, "defend". Yuno will dps and support.
Whenever the dragon charges up for a nuke, use "defend". In conjunction with Gran Aura, this will give you 75-80% damage reduction. So now his ~9k nuke does only around 2800 damage, which is easily regained with "Ex heal" from Yuno. That's it, you won.
The only problem is that you still cannot survive dragon's 1hit ko without BOTH Gran Aura and Defend active when he nukes. There is no other way AFAIK, Eden's Fall is too damn powerful. Since you can't refresh the duration of Gran Aura if it hasn't run out yet, the dragon will try to abuse that by charging up
at the exact turn Gran Aura fades, since Gran Aura cast consumes a turn
and you cannot defend afterwards till the next round. To counter that, you might want to wait for 1-2 turns before recasting the aura if you are still alive after it ends, but as the fight draws on for long, dragon will eventually get the Eden off when you can't defend. Make sure you end as fast as you can by catching the moment when dragon is vulnerable to Yuno's charge attack.