.03 depth of cut, use high helix endmills for aluminum
.0002 chip load per tooth * rpm (no limit on rpm, go as fast as you dare with consideration for your spindle bearings)
WD40 bath, or oil/air mist lubricator
I might also shorten a factory endmill if it is too long and flimsy.
Ramp into your depth of cut, or predrill entry holes. If you are really stuck, you could predrill the entire path with a slightly smaller drill bit (plunge roughing) and clean it up with the endmill for a finish cut.