If you were to add a unit into this game, what would you choose?

I'VE HAD IT WITH THIS GAME IT WORKED PLENTY FINE YESTERDAY BUT TODAY WHEN I LAUNCH THE BATTLE IT CHANGES TO A BLACK SCREEN AND I CAN HEAR NOISES BUT NOTHING IS HAPPENING. I HAVE TRIED EVERYTHING FROM CHANGING UNIT BOX SIZE TO CHANGE GRAPHIC CARDS. PLEASE HELP ME PLEASE HELP!!!!! (sorry for caps)...

First, I want to state that the crowd system requires memory. Crowds are made of a great deal of meshes which require memory. If you are having memory problems, try lowering the 'Character Animation' quality in settings. This plays a huge factor into the amount of memory used in this game. Second, the rest of the settings play a significant role in the overall frame rate and performance you will get in the game. - The jump from high to ultra shadow quality is one of the most noticeable performance diff...

So, my custom units that use ranged attacks are fine, but melee units like heavy knights and spearnan just stand there. Sometimes the change has only been to increase the unit's health. Why is this happening?

Has anyone experienced this? I get 2 teams lined up to fight each other. Hit the K button then both teams run parallel with each other in the same direction and don't ever fight. Its real weird.