You only get ashes once per run per 25th floor, and I believe you have to be in the tower (or at the floor or just in the party, not sure which) when the floor was cleared.
When you reach the top for the first time ever, it will warp you out of the tower, but you can climb back up if part of your party has completed it more than once (or maybe the party leader has to have cleared it once).
If your entire party dies on any floor, you'll have to climb ALL the floors again or use the ashes you got in this run to skip to the closest 25th floor (round down) unless you have ashes saved from previous runs.
You do NOT need ashes to enter or climb the tower, but you also will not get additional ashes for passing through those floors a second time in the same run.
Woah wait your whole party can just skip to floor 75 and just finish the tower from there? I knew you could skip to 75 but I thought you had to clear all the floors.
LOL been doing it wrong this whole time.
Yeah Kiyle...your entire party can skip the first 75 floors if you all have 3 ashes to start o_o but some choose not to in order to get more ashes and random drops
The first 50 floors is caek walk anyway :|