When I need gold I buy hp pots with arena points then sell them back right there in the shop. 8k ap = 14k gold roughly. It's just if you need a few and you can gather the ap from all your characters if you don't need the ap. It's not the best way but it's something.
On my sham I put 3 ball, 5 heal, 1 earth, 2 blinde, and 2 quake. (Lvl 15 as of now, planning to lvl sham to 18) Was wondering if I should tweak my skill build?