That XP herb, you're supposed to pick it and use it when the RB is about to die. But anyway a mana herb for low levels would be nice, as long as it's quite rare.
tbh MoH was pretty poor for farming ever since they changed how the magic skills land even from lower levels (somwhere between Interlude and HF, didnt play those chronicles much). But anyways it's all about the "half empty, half full bottle" approach - don't be sad that MoH is bad for farming, be happy that you can farm with Wind Strike D: