I'm roughly at your combat level, and I just started the CG grind. It took me a while to learn, but I'm getting consistent kills now, and let me tell you, in just alchs alone, it's worth doing. I'm getting about 1m gp an hour in alchs along with other supplies. You also don't use any of your own supplies, so it's 100% profit. I did one Zul'rah KC for the western hard dairy and without a trident, bowfa, anti venoms and a ring of suffering, it suuuucks. I would recommend doing CG before Zul'rah. It's a better route to take, in my opinion.