Brown trout did not get big by being easy. A heavy brown holding in a soft seam, ignoring everything on the surface, is not being difficult for its own sake. It has decided the calories are not worth the risk, and your job is to change that math. Most days, that means getting down to where it actually lives instead of insisting it come up to where you would prefer it to be.
Watch before you cast. A brown that is going to rise gives you signs — a slow drift up in the column, a porpoising back, a nervous bulge under a feeding lane. A brown that is welded to the bottom is telling you the day is subsurface. Tie on the weighted nymph, add the split shot, and stop apologizing for it. Dry-fly purity is a fine thing to chase on a different river on a different day.
And mend like you mean it. The longer your fly drifts dead and natural in front of that fish, the more chances it has to make a mistake. Drag is the thing that gives you away. A brown will forgive an imperfect pattern far sooner than it will forgive a fly dragging unnaturally across its window. Get the drift right and the fly almost does not matter.
On a guided day with Blackwater Ridge we spend more time reading the fish than rigging the rod. When the browns will not come up, we do not force the dry. We meet them where they are and we wait for the light to change. It always changes.