New player goals 1,2,3?

So ive been playing around 3 weeks now and have accumulated 5b and feel like stepping back with how much time ive invested, i went from new withing nothing to 99 huges to golden shinys 15s as i was doing events and then 3 rainbow shinys and 12 gold shinys, ive sold everything now and have 5b as everything rose drastically and i sorta wanted an out from events for abit so sold whilst pets have been overselling.

When approaching the game from an afk perspective in the last world what setup is perferred as id rather not sit with 5b id like to just afk casually. -all 99 basic huges(if so what charm loadout is best? I see lots of old posts just wanting accurate information) or a variation of rarity?

Are titanics just a bigger boost to events seeing as damage cap is hit so easily for the last area in the 3rd world?

Thanks for your help.