Ok, lets say that praying, speech texts and account sharing were not allowed and the HC was in fact only accessed by 1 player. How could you take it if they had:
50 million warriors
10 million pike
10 million sword
10 million archers
1 million cav
1 million phract
1 million ballista
500k rams
500k catapults
Plus wall defenses plus L150 Historic heros with over 1000 attack?

It would be unreasonably difficult to battle over. So why even do it?