So I've never really played this game seriously, just here and there once every now and then; recently managed to pull an additional 3(4 one became an eye sadly) SSRs with jewels (imagine my shock) so now I'm sitting at a total of 5 SSR.

Light: Sol, Rapael
Lightning: Raiko
Fire: Ares, Uriel

Enough SRs that most teams are composed of SRs (except for dark/light, those still need rares to fill slots). Also got an assorted number of SSR weapons and eidolons lying around from events, been working on skilling those up after reading Sanahtlig's guide. As for souls, I have unlocked most of the tier 1 and 2s from way back, for tier 3 I have Arthur and Joan and working towards Mortred. Most of my teams revolve around including Sol as the primary healer, it seems to work but I can only barely clear ultimate stages and I can't get past rank 2 on the accessory quests. Most of my kamihime are at 3 stars as getting them to 4th star is quite an investment; not sure which one to max first although I'm leaning towards Sol due to how useful she is.

From what I've read thus far seems like with the two fire SSR I have building a main fire team should be doable so long as I can get Amaterasu. If not that, what should I focus on?

Thanks for any advice.