Rarity

[Reap00]

I say it's pure luck because
-no disconnects for all 200 floors, this can be the most deflating thing as it is usually outside your control if happens
-room types, get exit in treasure room 5x in row on floors 170+ kiss your time or pomanders goodbye
-Pomander drops, they are random what ones chest give you and whether they are mimics or not
-mob distribution, starting room has 3 entrances 4 chimeras incoming, hope to whatever Kami will listen that the one you pull does dragon 1st and the others don't see you
-trap distribution, this can be mitigated by following the walls but sometimes they are just in the way
-Debuffs, these are completely random what ones you get and some are more ideal than others, and there can be up to 3 of them.


There is a good amount of skill involved as you need to know rotation, what mobs are ideal to deal with, range of attacks, attacks that can be stunned/silenced etc, but at end of day it is pure luck that will determine whether you get to floor 200 solo without good enough luck you will fail.

So players that have reached floor 200 solo were just lucky. Right.