I've been trying to play on Yukon, but I haven't had much luck yet in joining a team that didn't get steamrolled by the other team. Large areas full of rocks and other nasty things, many small tight tunnels that connect each of this areas to the other, this seems like paradise for spam of all kind. People who wish to take the point back have to wrestle through the spies and demomen and pyros and heavies and scouts in the enclosed areas, and when they're done they have to face longer range harassment from soldiers and snipers and demomen still, with the rocks favoring ambushes for the other closer range classes.
It seems the map is aggressively designed against defense: lose the middle point and you can already think about the next round. It doesn't help that you always spawn from the farthest spawn point unless you own middle.
So that brings in the picture engineers and their teleports, pushing the team forward. Thing is, while metal is abundant on the map, I can't for the life of me find a decent nest location. I can imagine hiding teleporters around one of the corners can be effective on defense, but that's it. Every place I've looked at seems either too exposed or too ambushable. Do I have to gunslinger here, or are there nests I just can't see?
Being on the wrong end of the game, the only effective placement I've seen so far is on the sloped side of the second point, when the enemy is down to their last point:
Is that all? What are the typical nest placements in Yukon?