Highly defensive builds can beat hescas, even solo. Your first goal should just be to get to the final round alive and with limited deaths as they can set you back a lot. General rule of thumb, aim for completing each level with a little threat as possible in a reliable manner, that's not just DPS, it's not dying frequently.
If one of you is better than the other would recommend super defensive for one and less so for the other. One person repeatedly dying will prevent you from even seeing the final round.