Greetings!

New guy here, although I have been playing this game casually for a few months. Kinda stumbled through early content, and after I took a break for a few weeks I found this forum and realized: holy crap, there is a lot that this game offers, and it goes far deeper than I could have imagined.

So a few questions as I rev back up to a decent pace for the game:

(1) The newbie question: Would people recommend to focus solely on one element for team building, or can I spread out to 2 or 3? What elements, in each case? (I spent a fair bit early on so I can field a "decent" team for each element, but I am trying to cut back on the gacha a bit.)

(2) The current money question: (a) Is Summer Sol worth chasing for, seeing as I have Brynhildr? Or should I wait for a regular pool SSR Fire healer?

(3) A build question: What is priority in team building? I've seen people advocate for maxing out weapons, accessory slots, eidolons, etc. and I look at the sheer amount of work required for all that and think "this may be impossible for the amount of time I can put in," so some advice for progression is welcome.

Thanks!