Historically Iron Age came after the Bronze Age, If you want to add Iron League, It should be above bronze. Iron is more useful, stronger and more durable [slayer-pantheon-thumbs] You can also consider stone and wood (Sometimes I think they are very necessary)
I thought about this aswell, iron just sounds way better than Bronze and shouldn't be under it, but above.
But you must be Bronze before you can be Iron, I believe. You can't just be placed in Iron, you have to fall down to it from Bronze. Even going 2/8 in your initial placements only puts you in Bronze 1 (believe me, I went 2/8 and was placed in Bronze 1). Ergo, Iron must come after Bronze. It all works out.
