I always have trouble in the late game especially on black forest because its the time where everyone just spams trash units like no tomorrow and in the end I either just get tired of it because it drags on for so long or I run out of gold from losing too many of my gold units. I also tried massing seige units but idk if its because I can't use them correctly but they die to stupid halberdier trash units really easily. In the end I run out of gold and patience and simply give in. What are some strategies for late Imperial games especially black forest where there are chokepoints that simply slow the game down tremendously?