Talk:GQ:Seria/@comment-29938244-20160925023317/@comment-5551215-20160927220517

You don't have to guard Seria or the others the entire fight, if you bring a unit with HP buff in their LS and some support buffs, especially cleanse/negate to remove poison from the guests. It is important to pay attention when the boss equips weapons in the second battle and guard Seria then for a little more reassurance, since she's the frailest because of EWD. Omni are definitely a good choice since their variety of buffs and high stats means they can do more damage to the boss while easily keeping the guests protected, plus their LS buffs are top notch and almost always include some HP.

Hallelujah would be a great choice, out of the newest OE released, but any OE with def/rec/HP buffs, healing, cleansing, regular and/or elemental mitigation, and/or BB management, so they can SBB more often, is good. Allanon would probably be a great 7* with his Ritus Staff and some other sphere for BB management. It's mostly about the buffs and the LS. Selena, Atro, Magress, and Lance are all good OE starter options.

The only thing I wouldn't recommend is a pure damage nuke. They simply can't kill the boss fast enough on their own when there are only three units in the party and most of those units have irrelevant or support buffs.

Although... Rize's OE could change that... (At the very least, she has an option for HoT but healing items could be enough. It would depend on how much damage she ends up taking and how much that messes up her HP scaling SBB.) You could run in with a Bolt Stone, a Hero Crystal, two Fujin, and massive damage spheres (although sparking will be harder with so few units) and UBB him first turn... Not sure if she'd OTK him though. XD