You will need even more lead if you are using mono main line.
On sunday we were fishin with 30lb braid and 10oz or 12oz to counter the "red weed" on ebb.
I had an uptider and that had 25lb mono on it, but I lowered it in as a downtide rod whilst the flow was reduced and wind was winning (becasue lines were going the wrong way), and that needed 12oz lead to hold and the braid rods were more than happy on 8oz.
Thicknesses:
0.5mm mono line @ 25lb v 0.1mm braid @30lb
Makes an awful lot of difference in tide, plus you just cant feel anything with mono, it is truly fishing in the dark ages.
Rob