High level xp quests
 

Other than Tesch scrolls and Sarnak braids ... are there any quests that are good for late 30s up through 40s?

https://wiki.project1999.com/Drolvarg_Teeth

Not incredible, but a nice supplement to XP on refit runs if you're hunting in Dalnir or DL.

As long as they don't kill you there (faction!):
http://wiki.project1999.com/Protect_the_Shipyard

Besides getting XP from killing mobs, this gives you some nice XP for every turn in. Quest itself even gives you noticeable XP up to 50+

Unsure if you have gandered at this list already or not.
http://wiki.project1999.com/Popular_Quests_by_Level

Unfortunately my druid will be KOS to these mobs without faction work not possible to me - so not possible :O

Are you a Halfling? if so harmony/sneak will make the quest possible. I'm not sure of the min faction required, you may even be able to harmony and hand in KoS?!

If not you can have a friend IVU you for each trade window opened?

Whilst leveling various toons off bandits in WK I met a mid 40's rogue who was doing the bandit sashes quest, had been doing it since the teens when they still gave exp on kill.

I wonder how good the xp is in the 40s.

I tried turning in GLS's to finish off the last part of 59. I saw the bar move after # 12 or so. Wasn't worth the effort of gathering wisps.

Drolvarg Teeth are legit exp up to at least 55 if you can stand the boredom of slaughtering greens.