27/09 makes some valid points, although it seems like you're well on the way with other endorsements. I agree that the extra flying time from option 2 may not be "loggable" PIC time. But as you say, it's time actually working at flying. A real eye opener. Although this won't get you your 750 hours, it is a step along that road. It'll also allow you to make contacts at other airfields in the right circumstances. If you spend your time chucking out meat bombers, you'll only meet meat bombers. If all you do is instruct, all your time will be around other instructors and students. The more time you can spend with the people you aspire to emulate, the better.