contender...

"Nothing" is peace for some people.

I think it's just a corridor.

so everyone always locks the door? even if one person needs something from the washroom they would always wait till the other person finishes?

I'm not saying these are bad suggestions at all, I just want to share my perspective. In my experience, it is completely feasible to acquire every item on every floor without using any Scroll of Upgrade. I don't really know how other people play this game (and I'm not saying there is a right or wrong way to play it), but I usually explore every floor before I use any Scroll of Upgrad because I want to use all of them on the strongest weapon/armor. There is almost never a single time that I don't at least find a +1 tier 5 weapon and armor. Again I'm not saying you have bad suggestions, I just don't know if it's necessary to make the game easier.

Sorry I don't know if I explained myself well. I was trying to say that it is possible to put all of your upgrades on tier 5 weapons 100% of the time. You just need to survive long enough. You need luck if you want a +3 tier 5 weapon to spawn, but you don't need luck to get some random tier 5 weapons.

Edit: There are ways to survive even the final boss fight without a good weapon/armor. I think it's worth your time to find other ways to survive longer without using the Scroll of Upgrade. This way it is guaranteed that you will end up with a tier 5 weapon/armor.

He doesn't have to. I worked in retail before and I felt like celebrating after I quit.