I lose to the spear hero like 90% of the time even if its just running default starting cards. If you're just here for the badges, for the love of god pick the guy with the spear.
You can have multiple decks for challenges and regular campaign... Just click on your deck name on the campaign map screen. I think the challenges are perfectly fine as is, as a player that's been playing for a few months most of the challenges are already easy enough, even later on. They are called challenges because they are challenging.
Woah got sidetracked reading something for a while and come back to this to find I have a 550,000 combo which isn't showing any signs of slowing down any time soon. That's crazy!
Oh, so for the final mission I basically have to fail it about five times so I can afford upgrades to beat it? Thats pretty damn stupid. Other then that though, very awesome game.
The one thing that made Solid City annoyingly difficult for me was that when the acid shot hits a person, the first 8 times I hit him he just exploded and the acid didn't run down the castle.
The Gunners and Homers make it really hard to get a decent combo without your fuel running out. You shouldn't die from the fuel until you hit the ground, its basically counters two of the ships, doesn't make sense and doesn't make sense considering there is a combo system.
Anyone who keeps just missing out on the enhanced badge, do not max out the homing ones, they bounce you up with their missiles to much to get a good combo fast enough.