Walkthroughs for custom maps.

Do the old-timers remember the map "Merchant's Honor"? In my opinion, it is second only to Paragon in terms of difficulty.

Something vaguely familiar. At first, I thought it was one of the standard maps. Turns out: it's a custom map, created by Kirinyale, here it is. I haven't played it, but I downloaded it once.
So, what about it? Let's talk about it in more detail?