In the PA28 I was taught 1 notch and 90 knots just before the FAF, IE, about 1 minute before the FAF. From there, leave that config until you break out and have visual with the runway. I was told not to keep messing with flaps and airspeed while in the clouds on a sensitive ILS approach as it can mess up your LOC/Glideslope
To date, I've come out at minimums (in PA28) and not had an issue getting the last few notches of flaps in and slowing down as needed
In something faster, like the SR22, I do one notch and 110 knots just before the FAF. I have, in this plane, when very stabilized, slowed to 90 and put in the next notch of flaps (2 of 2). Otherwise I'm not sure I'd be able to maintain a stable approach from 200' in the air slowing down and getting the last notch in so close to the ground/runway