I play isis, and i can say that what you propose would be way too drastic. Isis monuments rock as they are, i build one in my main base, one just behind my main barracks clump, one at my foward base, and one at my migdol clump, if it's in a different place to my forward base. By doing so, i make my entire base completely immune to Meteor, Earthquake, Lightning, Tornado, Undermine, locust swarm, plague of serpents, bolt, pestilence, curse, and frost, plus it forces the opponents hand when it comes to Forest Fire, Walking woods, shifting sands and underworld passage as well, they can never place it exactly where they want it.
Heck, with so many weapons just made redundant, the enemy needs to be able to cast bronze or flaming weapons or nidhogg or whatever just to stand a chance.
War doesn't decide who's right. It only decides who's left.