i know Ogre are getting killed by arblasters and mummy to pyros. But Gargoyles are not getting killed by frosters. They might by the blizzard and are getting killed by bladestorm and sonic blast if activated before they do their trademark dunk. Otherwise frosters are probably doing some damage to them but even if they have 5% hp left, they will still be delivering the full blunt damage to its target. Also, only very few top players have cleared the full dungeon and have all level monsters unlocked. Usuall the others in top 1000 are probably at level 3 Gargoyles, level 3 Ogre, level 2 mummy and level 1 werewolf. We are not even sure how the werewolf will be at higher levels. I am waiting to get level 2 werewolf atleast in next 2 weeks time to use for my offense. Mummy level 2 is getting killed easily by firebolt towers and ogre level 3 is still not strong enough. You can easily go back of ogre and escape the blunt damage and your sonic blast or blade storm can easily kill them. I cannot afford swordrain currently inplace of heal as my hero is not that great. 10k health and fire shield and poison shields are in 1100 range. If you are at a choke point and get hit by 2 waves of gargoyles one from regular path and another from adjacent, you instantly die. Each wave is taking more than half the HP. I am sure they are not more than level 3 Gargoyles.
Bottom line, you should definitely be getting more medals for those monster bases otherwise people might start skipping them altogether.