I think this thread will help with your questions until futui gets spare time. It's basically someone in the same position as you.
Futui said in that thread:
"We can not use mm_stakes | mm_stakes_destructible | mm_plank_construct_dummy"
Also if you haven't already make sure to read all of Maximilien's guides about map weight and stuff:
Best of luck, I'm not a map maker but I would be more than happy to do whatever I can to help test the map out as a player.