I'm not sure how to do auto-summon but I like the idea.
As for the target casting the idea there is to be able to "construct" a defensive line when your base is under attack. Because the cast range of each structure is the same as it's blight spread radius you have a large area to cast in. So if you have a critical structure under attack, say a Conduit, you can summon 4 Shamblers in a line between the enemy units and the Conduit.
it will probably only take a week or two to do because all he wants is an expansion of the terrain "Wild Forest" by ogre_, since it uses no imports should be quick so I might be able to help you out after xP
The Devour doesn't work. Could you suggest another skill that can replace it? The skill has to be the only air defense the Thunder Fury has.
About the Sentinel; the Defiance ability has a trigger that replaces the unit that activates Defiance, but the two units are exactly the same. It just makes the upkeep seem to increase.
No problem. Hopefully it'll be approved by the end of this week. I just updated the map recently, so if you should redownload it if you already have before playing with your friends. Gameplay should kick-off faster.