^Good advices and pretty complete guide ! 

i might add :
- The ranger class is pretty good at speedrunning, since it gives you a 10% movespeed on level 2, and 20% on level 4, and also has the possibility to jump over rivers with the bow equipped (and maybe skip the bridge, depending on map generation) 
- So yeah .. you can skip the bridge..
- The fastest way to find the 2 points you need to speedrun (The bridge & the Ash sorcerer) are not following the roads, it's actually hugging the sides of the map , you will eventually see the Ash beach, or even better, Fenrir's continent you'r looking for, and you are lucky, it will make you skip some big deviations, because the roads are (almost) never going straight.
- The ash beach sorcerer doesnt always have a shrine or a road connected to it
Probably a bug... even saw one without a way to go back up...  
- Do the Raider Axe
Only takes 4stones lv1, has insane DPS on lv3, that's the best weapon if you don't want to invest time into crafting something else , the elecrtic Nornir Axe's also a good choice (if you have the luxury to kill linorms)
At least that's my setup for a day 4 or 5 fenrir kill, currently praying Odin for a day3

I take it cannot be used in Glitcheless category?
But in 100%

Fenrir death should still be the time when it ends in my opinion. 

I guess wait for developers to give an awser if they change it or keep it in game.

Edit: The only way to skip event is to buy fragments from forest vendor - aka need warden and very close map with tons of big camps with 2 chests to loot for the souls and sell everything. But for that you need to grind like crazy and map generation....

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