For the people that don’t know, APP controllers want the least amount of people on their frequency. When there is more people, there is more chaos. So what APP controllers usually do is take them from center when they are descending on the Arrival or given an altitude to maintain. Then they bring them in usually on a downwind if they are not on an arrival. Then they put them on a base and turn them again to a 20-30 degree localizer intercept (angle depends how far out they are). This is the time where they give an ILS clearance, I always remember this as PTAC (position, turn, altitude, clearence). It goes like this:
N80991, 5 Miles from (intersection), Turn Left heading 200, descend and maintain 3000 until established on the localizer, Cleared ILS runway 23 Approach.
Then once they are on FULLY aligned (meaning on glide slope and localizer) then they are handed off to tower. If they have a go around, then they bring them into the pattern and bring them down again. If you want to control many people, then you going to have to give people speed restrictions,
I know I put a lot of Info that didn’t answer the question, but I think It is Quite Interesting.