All great options really, maybe I’m just over enthusiastic but I would thoroughly enjoy a day riding any of the mentioned trails. I don’t understand how cafall is too XC orientated but the Y wall final descents are the best ever. That’s just madness. Don’t get me wrong, I love zig zags, but you could easily ride that and grave yard on a cyclo-cross bike.
All are good options, if you want to spend a whole day BPW might be your best bet as there is a good variety of trails to try. How hard climbs are depends completely on your own fitness but BPW can be done all on the fireroad so is about as easy as they come. Blade is whites climb which is pretty mellow while still being rocky and involving enough to keep your mind off the pain in your legs. The cafall climb is probably the most punishing with some really steep parts, but it’s more satisfying than a fireroad slog.
To sum up, it doesn’t matter they are all good fun!