[Steam] tbh Deskbar Hero

You can't beat this? I changed up the archer and mage skill sets and managed to gradually increase the damage a bit. But you're saying I can't beat it when it's almost dead? Wow... I significantly increased the priest's defense and HP, and also boosted the healing amount considerably. But the priest loses half its HP from just one boss skill hit?? Seriously?? Honestly, the priest feels too squishy. Should I increase the priest's defense more, or focus on increasing the burst damage from the archer and mage before they die... I hope I can clear 2-10 by the weekend, right..?