Mark has pretty much covered it but I can add something to this.
All I cut is Alu,mainly T6,I use a combination of a 3mm 2flute 45 Helix cutter at 16000-17000 Rpm with a .17mm DoP with a feed of 400mm/min,Alu I find favours a thin and fast approach rather than the Ron Jeremy Deep and Slow,I finish with about 200-250 mm/min,similar to Marks approach.
It also depends on what you are asking it to do,I do a lot of thin panel work so my technique is focused towards that,I have to work around panel lift as the center of the stock is normally unfixed and can be lifted by cutter action.
Also worth pointing out that cutter diameter is crucial to material removal and ejection which is directly linked to the cut speeds you can attain,the larger the better.