Any tips for Vietnamese Mission 2?

I got to 52 mins before the last castle got destroyed, takes a while to clear the side, feels like it was balanced for the old game and is the hardest mission I’ve played so far (harder than the new campaigns for sure.)

Almost finished it, then Le Loi died on patrol when helping out the runnners, was going to win too rip. Turns out pretty much the only thing that works is putting rattans in the towers so they get rid of the straggler units faster, then you got a lot of time because only trebs will be an issue.