Heres a list of glitches that could be speed run tech
1 staying on a slightly Elavated edge while Being on the Cleric beasts Left? Leg will send you up a noticble ammount allowing you to make a plunge attack
2 getting throw into any load zones Mid Death Animation with Set your hp to 1 or -1 . Don't know what causes this
3 you can attack Enemies through thin walls. you can use this to technically cheese any winter lanterns you see Via Staying Behind a closed door
( note winter lanterns Can pass By doors [ if left open ] and climb ladders and go through load zones )