Walking down the Royal Mile in August is a sensory assault unlike anywhere else on earth. The flyering is relentless, the smell of damp stone mixes with fried street food, and every basement, church hall, and pop-up tent is packed tight with artists gambling everything on a sixty-minute slot. Out of the hundreds of productions currently carving up the Scottish capital, our current editorial spotlight is zeroing in on a select group of sharp, fearless pieces making genuine noise this season. This isn’t the whole Fringe, nobody can claim to see it all, but these are the curated shows driving…