The only thing I can suggest is that you bring alot of food that will restore alot of your stamina because going down the pitfalls can take alot of stamina so make sure to save every couple of floors so you can reload if you faint
Or you can save before looking for a ladder, remember where it is, reload and go directly to that place. You'll only waste stamina points once. And it will take less in-game time (but a lot or real life time, by the way). Just remember that floors 100 and 200 doesn't have stairs. I always use the holes here, in floors 99 and 199, and I try to fall only two floors.
If you can't find the stairs or a pit fall on floor 224, you may need to increase your mining degree by using your hoe in any empty spaces. You points will increase each time you use your hoe, hammer or watering can. If you are close this will produce the stairs.
