I have never seen telepathy or portals used by any Alliance minions in World of Warcraft. In fact, this is why many quests have you play the role of a courier due to lack of instant communication. This is also not considered "large scale" for the Marines. Every Marine has some form of Radio communication with one another.
I also have never seen "Ancients" as part of the regular Alliance Infantry. Theramore, Honor Hold, and The Alliance Outpost in Baradin hold are all "regular infantry," which is what the original criteria was.
Alliance Infantry:
Warrior
Paladin
Hunter
Mage
According to WoWhead these are the only Alliance Infantry. When I search for an Alliance "Infantry" Chimaera, or Stone Giant, nothing pops up. This is probably due to the word "Infantry." For instance, if you are the in the American Military as a Tank driver, Helicopter pilot, or an Artilleryman, you are NOT part of the Infantry. This is some what similar to why a lot of the units that you guys are listing cannot be built with the Barracks in Warcraft 1-3.
Stop adding all of these units to the scenario that are not allowed. If the OP had said "nothing changes" then I would have lol'd too at even 5,000 marines having a chance against 5,000 Chimaeras, Stone Giants, and Demigod Magic users but the rules clearly state otherwise. This would be the equivalent of me allowing the Marines to sit on their battle ships while their artillery cannons, and bombers bombarded the Alliance into oblivion. Follow the rules if you expect me to do the same.
I also doubt that the regular Infantrymen in WoW have this super armor that you describe considering that I could beat an Alliance patrol of 10 soldiers to death using a rusty dagger if I chose to.