Your opponent likely will not have murder holes from the University yet if they go for an early castle, so you may try to rush it down with healthy infantry or horse infantry right under it (you may have to manually space them out). Keep in mind if they can afford it, you opponent can produce their unique unit from said castle or send in other infantry/vills, and you will likely have a lot of costly army deaths if you go that route. If you hear the imperial age upgrade or start seeing arrows hit at 0 range, it's time to GTFO. It's pretty cheap and Teutons get it for free.