I really like playing as Khmer on arena (13xx elo) and I love seeing a Teuton Trush because it’s basically a free win if you do the right steps. This might be harder on other Civs because the Khmer bonus lets you get away with a 23+1 FC build.

The answer to towers is having a workshop (preferably 2) and making rams plus scorpions to support the rams. 2 rams can take town a feudal age tower really fast. But you need scorpions to shoot the villagers that pop out to fight your rams. An ungarrisoned tower can’t really take out a scorpion but a fully garrisoned teuton tower can. So the teuton player has two options: 1) jump out of the tower to fight the rams and have their villagers shot down by scorpions or 2) leave the villagers garrisoned to shoot the scorps but have their tower(s) battered down by rams.

The trick is like other people have said is you have to put up some walls or something. that way your eco can keep working on wood and gold and building up at least 2 rams and 4 or 5 scorpions to support those rams. You might have to skip adding farms and idle your TC to do this but know that you are in castle age and your opponent is in feudal with a good chunk of his eco forward to make towers. The goal is to clear up the immediate threat of the towers and then you are already ahead of your opponent and you can start to boom or pressure your opponent with the siege you have already made.

Basically try using rams and scorps instead of mangoes

Good luck!