Keep everyone back, build cheap buildings to scout until the end of the map, snipe the boss with a spell to bait it, then kill the boss when it reaches your front step without having to go through all the crap in between.
Definitely needs more depth. Add cards such as "Deal X damage every Y turns for Z turns", "Gain X armor every Y turns for Z turns", "Armor cannot go under 1 for X turns", "Shield cannot go under X for Y turns", "Use two more cards after playing this one", "Your opponent cannot draw for X turns", etc.
"was this an upload test if not you can usally test it without uploading"
this. do you really need to upload 11 versions of an incomplete (unplayable) game in the multiplayer section (when there aren't any multiplayer capabilities present)?
With this much complexity, there should be a "remove all" button. In addition, the items should be ordered by the priority in putting them on (belts before santa hats before chilote caps before earmuffs before paints) because i thought you a stage was impossible because i though you couldn't combine two items at all, when instead I was trying to combine them backwards.