I'd be mad as hell if 1000 rpm in aluminum, with a 3/16 cutter was as fast as I could go
Although a new Trico Micro-lube dispenser is expensive, it works extremely well in aluminum. There's enough air coming out to move the chips, and enough lube is applied to keep the cutter from plugging up. Misting devices may not be as effective because they are not able to dispense as oily a fluid as the Trico unit can.
You should be able to run as fast as that mill will permit, depth of cut being no more than the radius of the cutter at one go.