What am I doing wrong ?

[Occam's Butter Knife]

Oasis of Marr is way way overrated for levels 10 to 17.

West Karana is better cash and xp. Start out with Wisps, lions and Bears for furs. At 12 move onto the bandits in the mountains. Bandits drop bronze weapons at a faster rate than I have seen Orcs drop them plus they drop the Bandit sash. The sash is turned in in Queynos for Faction, XP and a bronze weapon worth 1pp to 4pp. On a 2 hour solo session I could collect 16 sash's and 4 or 5 bronze weapons.

After doing 12 to 16 there I earned enough for my level 16 spells and had ~150pp left over. There are good solo spots with few to no adds, if needed.

If your evil you'll need to work something out with a good race to do the sash turn in. I split the sash profits with a NEC i duo'd with he went to the S. Queynos zone invised to get the XP and faction.