I'm not one for dropping leads, rarely found the need even on very weedy waters.
I am as close to my rods as possible, and have my alarms sensitivity very high on my Delkims (other vibration alarms are available).
Try not to let the fish get into the weed in the first place, stepping back to strike and play fish helps, and can actually pull them 'off balance'.
I had one fish last season that as I struck you could see it turn on its side as I had unbalanced it, and 2minutes later it was in the net, a 23lb common that usually fought much better.
Admittedly I was fishing about 10metres out, so it never really got up any steam.
Hook size, I'm usually on 4 and 6's, and bait in weed tends to be balanced to just lift the hook up, so buoyant, but not mega pop-up.
In the weed short hairs, bait tight to the back of the hook, so a D-rig, ring on the shank or multi-rig.
Personal opinion, I found a standard Ronnie rig too heavy. The counterweight could pull the hook and bait down into the weed, reducing hook-ups as the hook is masked.