Talk:SE.RA.PH/@comment-123.202.98.5-20170518122755/@comment-182.30.68.35-20170518130452

You can check Cirnopedia as well as this wiki if you need information, and there's a fair amount of gameplay videos out on Youtube that might help you get up to speed via imitation.

Considering you have an "already existing account" instead of a "fresh new account", and you said that you have some of the most overpowered servants in the game, it should be possible to fully finish the event assuming you have enough apples (AP recovery items) in stock.

Regarding the Passionlip battle: the frontline gains 3k HP per turn as a free bonus, so as long as you keep the frontline from not dying via critical hits/NP attacks using any combination of Shielder/Zhuge Liang defense stacking, Merlin party invulnerability+healing, Zhuge Liang/Artoria (Summer) NP gauge draining, you should be able to score a win. Having Artoria (Summer) rapid-fire her NP on Lip may possibly be the best way to maintain DPS in the fight.