I would definitely go with 8 if possible. As for your hcg, I'm a huge supporter of using it, but I've never ran a cycle this short. I always suggest using it when you go over 10-12 weeks or use a 19-nor. So it's really depended on you and how bad you suffer testicular atrophy while on. If you do then use it, if not then your probably good. A 10 days blast at the end stoping a 4 days before pct would not hurt at all and Defintely make recovery a bit easier.

Worth running at that level, I'd usually say 10% and under is where mast earns it's value. I'm with Iron on the 8 weeks rather than 6. Could push the prop up a little? Proviron? Like I said earlier though, the compounds are nearly irrelevant here, it's all about the food. Keep your carbs going in as normal am, then drop em after early afternoon other than green veg. No sugars other than a little am fruit.