Noboostedgt, You have not modified the serpentine belt or pully system right?
10 horsepower is supposed to be the AC compressor draw
The processor is supposed to control the idle well enough for you not to notice this draw much
However most cars do just what yours is doing
Yes it is worse when the compressor is getting tight and ready to seize
Also the hunting for idle seems worse when the freon is low and it cycles the clutch too often
Chevtone puts a heavy metal "frisbee" on the waterpump of some motors to solve this issue
My 1990 Corvette has the factory frisbee on it still