Please excuse my bluntness but,
Preplanning is a non-existing word for us, we have no idea what our traffic will be like untill we see it on our screens (and with the range we are working we don't really notice all the arrivals untill they are 20nm or so outside our airspace (and the TANGA and ATUDO guys always seems to catch us by surprise)).
is the excuse of an amateur. Preplanning is ATC 101. Eurocat has a scan-out function. Use it.
Dash 8s are a problem. Fortunately they don't operate during the night time inbound rush.
Are you referring to high speed before the CTA or all the way into it?