Above on sub 3 pound Tippet, drag set light and CTS #5, handbuilt rod. If you fish anything more than 3.6lb you’re going to be skunked every day- here, they are too well educated- my biggest fish from this venue was over 19 lbs, a few years back, but they don’t stock anything much above 5 now. I used to needle Knot a 5 inch length of power gum into my fly lines, with a loop in the leader end (loops could be pulled very neat and tight). - then loop to loop with leader.I generally find that a floating line is all I’ve ever needed on small still waters, on the top flies or just sub surface , 6 or 7lb leaders usually are enough although a lot go for 8lbs to be safe .
Although I was told by a very good fisherman many years ago that presentation should be the first priority, then try plenty different fly patterns to see if you get interest from any fish at all.
Remember sometimes your doing nothing wrong but it’s just not your day