This game is a great idea, but put into practice... It's just turtle spam. Nothing else is worth it. It would be better if it was more like sending groups at a time like a traditional tower defense game does.
impudence is wise
Are medics not meant to heal anything with over 100 health, because it would be good if they healed heroes, who had lost less than 100 health, and when they where healing them brought them back up to 200 health.