Hi James, hogs and half hogs are my flies of choice for much of by WBT fishing on lochs.
They cover so many bases from static dries to full on pulling. Most of the time I will fish a hybrid approach....2 or 3 flies cast out and left static for a bit before a fo8 or slow pull retrieve. Normally a full floater and nylon but sometimes fluoro carbon or a slow midge tip to draw them under seems to work well.
Colour variations are endless but black, claret and hot orange are my most effective up north. A half hog mayfly version is an excelent emerging dun pattern.