I already had all the requisite cards upgraded except for the Rage Elixirs, so I put this together with unupped Rage Potions instead. It does seem to work fantastically against anything but FGs. Only on one occasion have I even bothered to want the extra boost from upping the Rage Potions, and that was only to get an EM one turn faster, so I suggest not spending the electrum. My main concerns have been wanting to get a shield faster or a replacement Fahrenheit in case mine got stolen or deflagged, but for those opponents to also have a reflect shield to stop a Fire Lance offensive is nearly unheard of. I'm going to test a 3rd Fire Buckler and see how useful it will be for dealing with HBs, but this deck is ridiculously fun and as good as advertised.