I have never raked a swim I sometimes drop a tiny rake in and draw it back a but not often.
Anglers are too finicky over putting their rigs in weed, that nice carp I had the other week came out of spot that is 4 foot deep most of that being pond weed, no finesse or faffing just a 15 wrap cast, combis rig and a oily stick as close to the size as your rig, leave about two inches or so and put a swan shot right up to the stick and make a break in the rig coating just after the swan shot, works a treat.