>>530317032
Estra SP safi Taair Tristan Homa Gloria

use Safi's +40% defense move, make sure Taair gives your squishiest units +20% damage reduction, buff defense with Gloria as well. Then just do the typical warhorn+phys def down on Luvata and drain her energy with Estra and Homa. Luvata can't do anything with no energy so you only have to worry about Beryl, which the +defense and damage reduction should let you survive.
Note my stat talents are maxed so this may not work for everyone, I'm a day 1 f2p.