Thread title and poll is about mages, not monotree failures.
So basically, archery is fine on its own. Awesome with other trees.
1H is fine on its own. Awesome with other trees.
2h is fine on its own. Awesome with other trees.
Destruction is terrible on its own. Requires illusion/conjuration to make up for its brokenness.
By the way, the only thing you're really saying with your statements, flooble, is that illusion is OP as hell, and that destruction, which is miserable on its own, suddenly becomes awesome when used with illusion. Know why that is? It's because illusion is OP, not because destruction is not broken.