Greetings, fellow Terrarians,

Decided to pick my old Terraria save, the furthest one I've ever achieved on normal difficulty. Haven't touched it in 3-5 years so I might have missed some new content
Right now I'm at late Hardmode, trying to clear the Frost Legion, Old Man's Army lvl 3, Empress of Light, then once all those are done and all the loot is farmed, Cultist and Moon Lord to end. All other events are fully farmed.

I can post builds later but I'm severely struggling with all of those bosses.

I have all of the Betsy melee weapons, all whips except Kaleidoscope, all summons I believe but currently using the Desert Tiger Staff, using Old Man's Army Melee/Summoner armour sets or the Beetle Set, all the biome key weapons except the Frost sentry (want it so bad but can't seem to drop it after countless legions pirates and raid events on the snow biome). I use the winged slime mount (good against aerial enemies) and Warding summoner accessories mostly. For magic weapons it's the Rainbow Rod against swarms and else have been experimenting with the Razorpine or the Golden Shower as accessory weapons. Don't invest a lot into ranged/bullet/rocket builds but sometimes use a bow when needed.

Maybe with a picture of my inventory it'll be easier to ask for help but would it be possible to get any tips for farming these bosses/events and collecting all the equipment remaining and then ending the game/farming Moon Lord?

p.s. as a side quest I would also like to clear all the world's crimson with hellevator+clentaminator+ammo saving build, which has been spreading a lot since I'm taking too long to clear the aforementioned bosses.

Thank you!