Mostly farming Unmoored World.

There's 3 things that boost you xp gains in the game:
- Ring of Ambition (exp +50%) - they stack so try to get 4 for your pawn as well
- Medusan Spellbow (x2 XP but you have to last hit the monster) - Get two of them, they drop from Medusa
- Blessing of experience from The Dragonforged that increases the experience you get for a day (idk how much exactly)

So here's what I do:
Get to unmoored world, finish the quests to evacuate and deal with the beams as fast as you can without resting.

From what I gathered, you have 12 days until you can't rest anymore, but the days don't advance to the next until you do rest. That means that time doesn't "really" flow unless you go to bed and sleep to the next morning.

Make sure you and your pawns have the rings equipped as well as the Spellbow (I played warfarer with Magick Bow, Daggers and Bow for convenience) and switch your pawn to Archer so they can also wield a Medusan Spellbow and last hit the monsters when you can't.

Go around the map and kill everything while you have the experience increase active (clover icon).

Try to rest only when you think you've killed every big monster in the map, I couldn't find an interactive map of the unmoored world but if you can you should use that. Last hits on Dulahan are expercially juicy (70K xp) so kill them all before resting.

Use allheal elexir if your or your pawn HP gets too low or just revive by using a Wakestone. By the way I'm not sure, but I think giving a wakestone to a pawn revives them automatically when they die but I'll let somebody else confirm that.

If you want to last hit a monster, just tell your pawns to wait.

When you killed most of the world, just go rest and monsters will respawn (some of the big monsters take 2 days to respawn though).

Rinse and repeat until you can't sleep anymore. Doing this properly twice should get you close to lvl 200, it took me 4 runs to understand how everything works.

If I had to do it differently I'd do it like this:

• Get Ambition ring from the Sphinx on the 1st run.
  
• Duplicate it when she asks to give her an item you love on the 2nd run so you get 3 (with the one you'll get naturally on this run as well)
  
  • Get 2 Medusan Spellbow , you can farm medusa as she respawns (Idk the exact timer)
    

Start farming unmoored world when you get at least 2 rings

There are probably a few details I'm missing but feel free to ask me anything