Be careful when anchoring in a flat calm. You’re likely to enforce an exclusion zone due to continual casting dries over the same water.
Free drifting, even in a light wind, allows you to cover new fish and adapt quickly upon spotting them. It’s less restricting.
When sunny, target any rising fish with a small greased up scruffy Hare’s Ear. Cast to rise form and give a little pull.
If trout are taking nymphs higher in the water column, add a buoyant foam fly to the point. This holds the nymphs up.
If fish are taking deeper down or at various depths then add a heavier Buzzer to the point, which will anchor the leader down.
When fishing dry fly in a reasonable calm, use a single fly and keep it afloat with Gink. Two flies might spook the fish.