Ideas and suggestions.

What you described has no effect whatsoever on the fact that this spell clearly belongs at level 5. I would say it is clearly more useful, stronger, and used more often than Sacrifice. Swapping them seems like the optimal solution to me. No one will be shouting "hurrah!" upon receiving a level 4 Sacrifice in a shrine.

Moving Armageddon to level 5 will double the chances of finding it in the Dragon Utopia. Therefore, the effect might be opposite to what is expected. But it will decrease the chance of building Armageddon in the guild. So it might not be. This is why I called this proposal controversial.

If the problem is specifically with shrines, then it should be solved from the shrine side. Especially since the level of Armageddon is "pure canon," while level 4 shrines are HotA's innovation, so they are treated with less reverence.