For a flavor like the commercial Marlboro juices, try FA Maxboro Ultimate at 5.5%. Takes about 2-3 days to steep enough to be ready. The flavor begins to be spicy at this strength, to my taste; if you like that quality, try 6% next time.
I have made Shade and Virginia at 7% and the flavor is good and strong, but it takes about 30 days before it smooths out. (this is in VG; PG should steep more quickly). Both of these make good tobacco bases for adding other flavors such as coconut or menthol.
FA Camtel Ultimate is also good at 7% but seems to take even longer to steep sufficiently. I think my bottle went 45 days or so before it was ready. (again, the base was 100% VG) I thought the flavor was very good, certainly better than the average Camel
juice.