If the two systems are not tied together then I think that AP702's are enough for each 185g system.
There's a point where over sizing actually hurts you. Initially the skimmer will be wonderous and amazing, then after 4-6 months you will wonder why my $$$$ cha-ching grossly overpriced skimmer is not producing anything except tea water. Large misconception is that owners then wonder why they still have readable Po4 & No3 levels and some slight hair algae growing on their favorite blue tort. When over skimming, yes you have maximized the extraction of proteins and whatever that scientific garble is for attraction to bubbles but.............. it does not eliminate Po4, No3. Helps, but does not eliminate.