I would probably leave it in primary for the 2-4 weeks like you said. If you can drop the yeast enough in primary, though, you should be able to just secondary in bottles. Personally I doubt you'd actually need 6 months with a 1.072 beer (or a 1.088 for that matter, as long as you had a good fermentation (pitching rate was good/etc)). I'd say you need to age it until it tastes good. You'll have an idea when you taste it after 2-4 weeks how long you need to age it.