!!!! IMPORTANT !!!!
Do these achievements separately since you need to take off your gear when in a cell for Arachnophobe
!!!! IMPORTANT !!!!
They Fit Just Right
IMPORTANT: when running out of prison DO NOT open the chest with your gear, DO NOT I repeat DO NOT take off your prison clothes, NEVER. You can change only your weapon through the whole playthrough. TRINKET, AMULET, HELMET must be empty. If you mess up, simply load up your latest save.
-tested it and it works

Arachnophobe
-when in your prison cell take off everything, put HIGHEST diff and simply keep pressing the STOP command for your character so he wont attack and will be in place. Let the spider kill you and you got the achv.