That all depends on my tactics. I may not choose to charge straight at you.
Instead, i would likely use my crossbowmen to fire at your ballista crews while my light cavalry kept the rest occupied. I would also use my Horse Archers to make passes at your front line and flanks.
I would then bring my Infantry and Archers forward. My archers would stop when they are able to fire at your infantry's ranks. Your cavalry will either stay where they are or try to flank my army. My heavy cavarly will either charge your lines or intercept. My heavy cavalry will easily be a match for your medium cavalry.
If you move your pikemen to take out my cavalry that will leave them and your other infantry exposed to my archers and light cavalry, as well as the bulk of my infantry. I would keep firing into your lines until there were no more arrows. I would then charge with my infantry into your line, which would fall quite easily due to my sheer numbers and casualties that you would have received.
I would then move in any remaining cavalry to dispatch your remaining archers from the flank. This would also mean that they would have nowhere to run expect into the infantry, and so would be unable to run, regroup and take potshots.
