Uhh what? I'm at 2.22 and I haven't seen any choke points at all.
Basically I just use my tactics I developed in Advance Wars and been obliterating every single map so far on natural stamina regen.
What exactly was the problem with arties in 1.11? I don't want to wait for stamina to regenerate and check it myself to help you ><
If anyone's willing, take a screenshot of that map and I probably will remember how i cleared it. All the maps up to 2.22 so far has been cleared on first tries for me.