Hi, that's a pretty and interesting map! I don't have much experience rating maps, but I have one criticism - the blue and yellow starts are very vulnerable, as the ice gates CAN be broken! Then you have to defend both sides of your main base, when the edge players have a safe game. Additionally, if the gates were invulnerable - summoning heroes like archmage can very easily harass the workers there by summoning through the barricade. Otherwise - the middle double permanent seems scary, but overall it's a very polished map in my opinion!