I like to fish them in moving water, slightly weighted and with only imparting a bit of action by twitching and adding just a few strips. The rest of the action come from the fly itself.

I typically cast "quartering" upstream (i.e. up and angled across). I immediately throw in an upstream mend which help the bugger sink faster and keeps the fly line from developing a belly.

When it gets across from me I throw in another mend, but not too much.

I then let it swing across the current and downstream.

I jiggle the rod tip left and right to get more movement as I trip and jerk upstream a bit, before picking up the line and casting, usually with just one false cast.

This allows you to fish the bugger like a nymph, wet fly, and streamer, all during one retrieve.