By the way I made these a while ago specially for the Hell corrupted area of the level if you want to add them to the resource.

viewtopic.php?f=21&t=2457

They should probably be combined with the existing palm tree selection.

I would like to know what monster will be the final boss

i like the super Dn3 overloard in stronghold, maybe the final boss should be one of the super monsters in the bestiary that have been not used... (diabloists, terminator, super infernal spider, dn3 super source guardian/source guardian, moloch, and specilal magmantis have all been used.)

Maybe you could make some sort of breed mother, like a type of queen that is infesting the maps, or maybe the end boss to doom3 roe.