Hey Everyone,
I'm sorry for the mess with the initial Iron update, it contained an error that made too many skill points available, and all the fields were adjusted for difficulty with this error in effect. After fixing the error, Iron mode became unplayable, so in the last 6 days all the 120 fields had to be playtested and adjusted again to set a "merely beatable" difficulty (for me at least, with my not great, not terrible GC skills). It's done now and included in v.1.2.1.
Difficulty is difficult to set just right for as many players as possible. Iron mode is meant to be hard, but it can be played to the end. You will need to go back and open those stashes, try different defense setups on trickier fields, redistribute your skills sometimes, consider calling the last few waves of giants early and then juggle with the walls, have some mana farm, exploit corrupted mana shards, use pylons, pause when picking where to drop strike spells and manage enhanced shots, and more.
Some of you might still find Iron mode too hard, or probably too easy, I hope you'll have some aha moments, and some moments of hard earned victory, and the feeling of being OP going back for a bronze stash to an earlier field.
Good luck, have fun!