To mill aluminum with a ROUTER, you need tooling designed to be used with a ROUTER. The feeds and spindle speeds you listed are useless to someone using a router with 10x the spindle speed. (unless they can cut at 150+ ipm). Spend the money and get router bits designed to cut aluminum. As I mentioned in another thread, check out
http://www.onsrud.com .they have a huge assortment of aluminum cutting bits designed to work at router rpms. One other thing to consider, as was mentioned, is coolant. If you dont want or can't use a liquid coolant, try setting up an air line to blow into the cut. This will help keep the chips clear and keep the cut a little cooler.
Gerry