So you've got 4 slots for 4 of your top AMPs in the Buffalo Metro of all time:just Erie, Niagara and Cattarugus Counties, no Canada spas included. Think long and hard, (no pun intended), over the years: I've been hitting up AMPs since about 08'. You'll probably come back to edit your responses.
Tranquility
Harlem Rd. AMP across from Dairy Queen near btwn the 33 and Eggert Rd.
Genesee St. AMP next door and upstairs from The 33 Speakeasy
Transit Rd. Spa in W. Amherst a couple of.miles shy of Millersport of your headed towards Lockport in Transit, (never even got a HE there but appreciated their service and one of the AMPs gave me an addl 30 mins or so just because she wasn't rushed.)
P.S. Remember Lotus Spa in the Falls not too far from Seneca Niagara? They sucked.