Well Surgicalsteel, I just used Mankind to beat the giant frog. I maxed out the research tree, summon paladins, clerics, and wizards, and cannons. Had my mana to 9999. I would also summon an arch angel (max out tower hp level to do this) every now and then but I mostly relied on paladins, clerics and wizards. I spam hobbits so the big frog doesn't advance very fast. By the time he was 1/4 across the screen he was dead :D Do not stop pressing 1! Hobbits are great for distracting the enemy