So this is a circumstance where a non-investor is getting some equity for being an advisor and sitting on your board? Best practice would be a straight employme

So this is a circumstance where a non-investor is getting some equity for being an advisor and sitting on your board? Best practice would be a straight employment agreement - here's your responsibilities, your comp, expenses we cover, etc. You should also have by-laws, charters and policies&procedures for your board and its committees. You may find more examples if you search for compensation structures for independent board members - who are usually comped with a mix of equity and sitting fees.