I think the best place to level and farm at lv 35-40 (where I am right now) is in the Zertinan Caverns, (SPOILER)in the place where Adrammelech used to be. The Shambling Corpses drop crazy good loot, they're relatively easy, and they just keep coming. Also, it's kinda close to the Westersand Crystal.

Also, (SPOILER)Venat gets explained. There is a HUGE plot twist after Giruvegan. Reddas joins your party after that.