I'm probably not the one to give really helpfull advice on this.
Since I started using my Scott #4 and one fly (2 in a drifting boat) I use a Froghair 9' 7lb point, tapered leader needle knoted to the end of my line.
Now the weird bit. I cut off the last 4' from the tip of the leader and water knot on 3' of Drennan 4lb standard nylon, followed by 3' of 3lb.
Turnover is superb, the nylon strong and willing to take a rub down with Fullers Earth and this rig has landed double figure fish. It cuts through the surface film with ease but can be made to float. Fish can't see it cos it's thin and flies like it cos they get movement. Big lures hate it it but the feeling is mutual. It also seems to tangle a lot less, even with direction changes in a swirlling wind.
Just a thought that will probably mess with a few heads...
Euan