Maybe if I find the time, I will look to make a more in depth guide about Pure Prisoner Mode run.
Now for some basic stuff that I like to do (reminder, that is only meant for Pure Run): Never ever fight against guards. Get the +10 Agi and +10 Dex Acc early (you can even get them Day 1, makes battles on the 1st Floor easy, since you basically get Stats for 4 Levels). Don't fight in the Bar. Don't increase Order, unless it is about to hit 0, to make more money (as long as your Order doesn't go below 20 you should be fine). Don't fight above 25% Fatique, it's a risk you don't need to take. Don't use Taunt or Flaunt, unless it is really necassary. Get the Problem solving Edicts always ASAP (I tend to go for the expensive ones there but sometimes it depends). On the 2nd Floor get stuff like Skewer, Cleave and Healing Thoughts. Rouges are a High Prio Target, eliminate them as quickly as possible. Same goes for Lizardmen on the 4th Floor.