Break into my secondary weapons, bc all fighters should have more than one weapon, even if the primary is magic. A pikeman isn't useless if they loose their pike, they just grab something else.
Then, get creative.
Fun Fact: seriously throw sand. Especially hot sand. Sand retains its heat and was 100% used against men in plate armor bc it got through all the cracks and burned them.
Also, burn some chicken feathers, let loose the pigs of war, especially if there are elephants...(you all think I'm kidding, I'm not. History is fun, yo.)