Board Thread:Questions and Answers/@comment-28575568-20160528093844/@comment-5551215-20160530034159

Swap Rize for Laberd. He'll reduce damage through mitigation and help with BB management a bit. He's fantastic for hard content.

Raise Vermillion for other troublesome situations. She conflicts a bit with Laberd, but they're pretty strong individually. Vermillion will also help with BB management and give you HoT. Depending on how you set up your Kulyuk's future SP options, he might never conflict with either of them. In the future, pairing Laberd 7* with Selena OE will be much better, but Vermillion is still a classy lady and her 6* is strong IMHO. Selena's 7* form isn't too bad either, but Vermillion 7* outclasses her except for the Angel Idol effect.

Raise Averus and Adel as backup mitigators, when you need a different position filled. You'll probably use them less often than Laberd, but they'll still come in handy now and then.

Reihard conflicts with Kulyuk, but in future if you need different team composition and don't want to use Kulyuk for whatever reason, he'll reduce some of the damage in various ways that doesn't conflict with Laberd. He'll also clear up status ailments plus add negation for 3 turns, has defense conversion as well, and helps BB management a bit. Once you start doing Trials and Grand Quests, where there are multiple squads, it'll be good to have him and Kulyuk leveled up and on different squads.

Vern will be great for damage output, if you're not using an Eze OE friend. She'll be even better once you can get her OE on your team.

As for the rest, you'll only want Oguro and Yuura for Raid or maybe Trials. Berdette is a good swap for Reihard and Kulyuk, if you don't need status cleansing, aren't using them, and need extra normal attacks. Situational but completely valid for some hard content.

Gildorf should be used as a possible switch for Rize, if you need a nuker who isn't reliant on their health or you need AOE Infinite SBB. Rinon could come in handy if you need burst healing.

To be honest, I'm not sure what would be best. It depends on what is giving you trouble, but I hope that helps a little? ^_^;