When fishing a strong current the "no-strip" method is definately worth trying & probably should be the First thing you try. Not to be redundant with Al, but Big-Girl & Succonessett are two prime examples. In both cases casting perpendicular or even a little up-current was the prefered method, then a little up-current mend, then letting the fly & line swing past. The only stripping necessary is to keep fly contact.
Now for some difference, the morning I was "in-the-zone" at Big Girl, I let the fly swing all the way across the "C-shaped" bar at the tip & twitched the fly as it went into the deep hole behind the bar. The pickup was so light I thought a hooked a micro & started chatting with Al. It finally dawned on me that I had never really set the hook, so I gave a little combined strip&rod set & that's when all hell broke loose. As best as I can figure, the cow inhaled my fly & proceeded to swim towards me at a leisurely pace.
Now at Succonesset, we were anchoring up in the deep water about 50' above the bar. Getting a boat into good position on a rip is not trivial & it took us about a day and a half to really figure it out. The most effective cast was to flop out about 40' of line perp. to the current, then play out more line. Again, as best a we could figure, the Maks. were basically cursing the bar & waiting for disoriented bait to get washed out of the deep water onto the bar. So, we were playing out line & getting out fly to wash over the bar. If there was no strike you could simply strip in 8-10' of line & then play it back out to try again. I should also mention that there were Maks in the deep water, but they were less concentrated, however once in awhile one would pop up right off the stern of the boat flowing our fly as we were stripping in.
There are tons of example when the swing or dead drift should be tried, mouths of rivers & estuaries (especially if there's jetties), The Canal, Any rip close to sure, ans so on.