What do I build to counter High def glamour units?

[curtadams]

Watching the AI performance with LA Vanheim has convinced me the glamour units are too good for the price. The last two times I've seen them they've done unbelievably well compared to other nations - twice as many provinces picked up as any other nation. I haven't had spies, but looking at what, when, and where they conquered it looks like they can clean out independents with no losses. In the early game 20+ def with mirror images is virtually invulnerable and you shouldn't be able to recruit units like that right off the bat.