Talk:Barbarian Castle/@comment-173.64.215.193-20140824040515/@comment-25021853-20140829164633

They all follow the same upgrade pattern for the same cost per level. You can go either route, but alternating and upgrading them together will get you the increases sooner, while doing one at a time will get more and more expensive till you max it out at Level 20, then the next castle will be cheap to upgrade for awhile. I upgraded my Barbarian Castle more than the other two at first, but now I'm leveling them up together, and you get more total nerds every 2 hours much sooner if you upgrade all 3 together (like upgrade one to the next level, then get the second castle leveled up too, then the third to the same level and go back to the first castle again as you collect enough elixir for each level upgrade).

I'm at Level 16 on my Barbarian Castle and Level 15 for the other two, and am getting 75 Nerds every 2 hours and have my Defense at 9. Once all three Castles are maxed out at Level 20 you will get 90 Nerds every 2 hours, have a maximum capacity of 115 Nerds, and a Town Defense of 15. I should be there in 5-7 Days at my current rate.