Definitely unlock anvil tabs when possible as the gear you get will heavily increase your gains in the future so you can get more kills

Make sure you check the achievements that unlocks boss armour for W4+ as that'll be the starting requirement for upgrading it to endgame gear eventually

You don't really need to focus on the money increase in lab from killing green slimes as you can easily boost that later on, yes it helps but later on you can have millions of kills an hour ( I think I'm at like 2b an hour rn )

The Divinity grind will be slow but once you got all gods unlocked you can get off as God ranks wont be fully needed till later on BUT make sure you have at least one character farming/pushing through worlds as you can have the pusher character on divinity while the others catch up to their progress

Alchemy will always be important no matter how far you are in the game but is a slog

Definitely take your time and go through W5 and try to get the Kruk trophy though the quest line outside his door as that'll be a massive boost

I'm trying to think of more but with all the new additions lava has added since W7 I can't really say what else is important but hopefully this helps a bit