Thread: What to build?

Thanks for the answers so far guys.

Nergal? I do have her, so a probable setup could be like:
Soul: Ares, Uriel, Nergal, Sol; Raphael and whoever else as backup?

For light I run the following currently:
Soul: Raphael, Sol, Summer Brunhilde, Dike and whoever else to throw in as backup

I think my problem might have to do with weapons, most of my teams only have skill 3-4, usually skill 3 for light (cause Sol's healing) and 3 or so offense for main element and 1 HP (as I can't find more offense weapons). Sitting at roughly 29k attack stat (not sure what this is supposed to mean). I have quite a few fire weapons though, the team runs with 4 attack++ buffs at level 8-12.

I find currently in this event that my wind team is having quite a good time even without a single elemental SSR.

That team is as follows:
Soul: Maeve, Iblis, Sol, Caspiel, other 2 are there to gain XP (changing Caspiel for Raphael would increase debuffs but drive normal hit damage way down, burst damage would remain the same though or something).

I imagine this fun is due to the -50% attack debuffs combined with Joan's skill which allows this team to survive somewhat. The weapons (mostly SR with 1 SSR think from event) give roughly 3 attack+ and 2 HP+, not the best combo so needs work.

Currently running with Joan more than Arthur as I find Arthur can't really survive in ultimate stages. She outputs damage fine but lacks defensive skills for those enrage moments.

If we consider R and SR, what would be an ideal build for light/fire? Let's assume I have most rares since 2016.

Dark is kind of funny as I have a near max level skill 20 weapon (from feeding rares one at a time RoB style) just this past Valentine's day event. Sadly I don't really have much to build on. Dark is limited to Eligos and Beelzub as well as assorted rares.

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Side note, I currently have enough to max one SSR, should I get Sol her final star? Or save it for someone else?