I had good results with strips of tiles, but obviously couldn't "line them up" with previous lines of tiles to get good alternating patterns. My tiles were also significantly smaller... and even though I tried to mix things up by cutting some at different angles and different lengths, the end result is still fairly satisfactory:

I used a few individual tiles with braille-rivets (from my saved up medicine boxes) to portray tiles that had slipped. Although it surely isn't as visually pleasing as an individually-tiled roof, it was probably quicker. I say that, even though I spent over 2 hours preparing the shingle strips and another 2+ hours painting them. I also wonder if I shouldn't have overlapped them more. A few of the strips show signs of having been laid down too hastily, and too high on the underlying layer. I'm sure it'll be unnoticeable once I get some moss and creepers laid down. Now to find some birch seed pods for the ivy!
I really like the way this village is shaping up. The plaster between the beams is perfect!