Most would grill lamb chops,or roast at about 350�.
If you are cooking on a traditional Cookshack,I'd go at peak therm setting to an internal of about 130�[depending on how pink you like them]
Most folks don't put much smoke on lamb,so maybe an oz of fruitwood?
I'd do one and check it at the 30 min mark.
Adjust your time for the batch from there.