I would suggest mixing up your rep range throughout the week. For instance on Monday and Friday do 8x3, while on Tuesday and Thursday do 3x10-12. This will provide good good variation of hypotrophy, so that you not only maintain size and strength but also lose a fair amount of fat.
Train your legs. Working your legs should really come before running, even if you have to cut out cardio. Deadlifts and squats are amazing compound movements that do wonders for fat loss, strength and muscle gain. They are the super movements of weight lifting, IMO

. Your effects will be greater with weight lifting and a little bit of cardio rather than cardio and a little weight lifting. Diet is the most important thing though, as I'm sure you know.
And what about your supplementation? It is important to be getting proper nutrition while working out. BCAAs are a must in my book. A couple grams of crystalized Vitamin C intra and post workout are great for reducing cortisol.
There are some great fat-burners out there as well that would help speed up your fat-loss process.