It's been a little over a month of playing and I just got my fifth MLB character. So far with my current resources I have them at level 171 (Ran out of battle data)

My MAIN question is after having saved all my resources, like the battle data, credit, and core dust cases, how and when should I be using them? Cuz I'm trying to be conservative with them, thinking that they'll be more valuable to me in the long run. However, at this rate I think I'll end up never using them at all lol. Is there an ideal or like most effecient way to be using them?

Another question I have is that in the picture you can see I have 320 of the fav item maintenance for season 1/2. I got it from Solo Raid Museum. I don't see any of the characters being super in the meta rn, so is it kinda just useless to me?

Last question, now that I have my 5 MLB characters, should I start saving my gems for the event banner rather than the ordinary/standard banner? I still plan on doing the half off daily pull every day. I also still have 3 of the bonus recruit things left (to pick liter, alice, naga etc).

Last couple things to add; I'm current in the middle of chapter 25 and can't progress, I'm completely f2p, and I just started building my "shotgun team" which currently consists of Tove (planning to treasure her in the future), Arcana FM, Treasure Drake, and Soda TB.

Those are my main questions. If there are any other tips or advice you have for me, I'd greatly appreciate it. Please, PLEASE comment on my post lol. Thanks!!

Asking for advice as I've just passed the notorious 160 wall