Slider over groundbait with caster / dead reds and a small amount of corn / handfull of micro pellet.
Then fish live reds, dead reds, caster then corn in that order.
Always found you can up the stamp of fish being caught and get a few bonus fish by doing this.
Groundbait in that depth 50/50 crumb or crumb based with the other 50 a fishmeal based to ensure its sticky enough to get to bottom and carry freebies.
If wind in face would try fixed waggler just over half way down slope at 7 ft deep and would feed live maggot or caster.
Would cast a few feet past line and let waggler drift toward me. Hook bait will then fish on the drop, down to 7 ft in 8/9ft of water then come to rest on the slope. Can then gauge where fish are and depth they are feeding.
Any loose feed that gets down slope will attract fish up it.
Most bites will.be sail aways unless on drop as fish tend to swim back down or along the slope.
Just be aware deep water, slope and wind can cause tow alomg slope and feed / fish may be well away from where your bait is going in.
With either slider or fixed waggler be prepared to cast about to find where feed has settled.
Experience has found fish and bait to be three or four rod lengths away from where I thought it was, either to left/ right or right in front of me but away from bottom of shelf in extremely windy OR steady wind of 10mph plus as a tow forms on the bottom even in small venues.