Stardew Valley

use crystalariums to grow 100 jade. Head out to the desert trader on Sunday and trade them all for staircases, then just climb straight down to the bottom

Bombs, staircases, luck, and speed buffs. There's a secret note that leads to a permanent luck buff and that's nice to have but not necessary. You'll want a stardrop luck day though, the higher your luck the more likely ladders and drop shafts spawn. Ruby and jade in crystallariums can be traded for spicy eel and staircases (on Sunday) at the desert trader. Spicy eel is great because it's both a luck and speed buff. I also like diamond to trade for triple shot espresso but you can just as easily buy coffee and cook the triple shots yourself. Bombs from the dwarf or trade quartz for them at the desert trader. Bring salad for health. (The best food buff is the magic rock candy and if you've got one it's a good time to use it instead it the spicy eel but they're not exactly easy to get.)

Use a desert warp totem or similar so you don't have to wait for Pam to take the bus.

Bomb the shit out of the floor as you go, don't worry about collecting ore (that's not why you're there), and use staircases on infested floors. Pro strats often involve the slingshot and explosive ammo but it's not necessary.

Or just staircase all the way down, lol. The game definitely mentions you cheesing it, but it's a totally valid strat.