Yet Another Beginner 'Help Me!' Thread

[Nerina]

Hello! Actually, I started playing the game waaaaaay back and played it only for the sex (login like thrice a month lol) but seeing that I have more free time recently, I decided to start playing more often.

My predicament is that I don't know if I should re-roll a new account or just continue my current one. I don't really know if my account is good and I lost direction (I don't know what to do lol)

I completed until chapter 28 of the main story
2 SSR himes : Sol and Titstania
2 SSR Eidolon : Fafnir and Ouroboros (+0* Quetzacoatl)
7 SR himes (+ 4 story)
12 R himes (+1 story)
Total of 3 0* SSR weapons, a bunch of 0* SRs and stuff
Rank 37
D'Art (and all the souls required to get her) plus Van Helsing

I am totally unlucky with Gacha, I already rolled all my gems and I only got 1 SSR hime so far! (I re-rolled for Sol)
I just read the KamiPro guide as well and it says there that I should focus on one element. Seeing that I have Titania, then I guess wind will work? I'm pretty lost at the moment, I can't even clear expert level yet.
Using AP potions only give away like 23 AP and it's good only for 1 standard, what a waste.

So, before I buy the guaranteed SSR ticket, any suggestions on what I should do and focus on at the moment?
Should I just re-roll a new account and get something like Amaterasu or something else?
Is picking D'Art first a big mistake?
What is the general priority for uncapping characters?