survived until day 7 and then became bored having upgrading every single thing. i just repaired the balloon which was at 99.0 and won. starts getting bored after a while. also it is a little too easy because if you go on your fort you can't be hit. 5/5
the easiest way to kill bosses: first kill all of your enemies. then just continue to fire fireballs at the boss's head and you will win. (some times the boss's head will get to zero and you just need to send in one soldier to kill it)
for chapter 13 your best bet is to spam wizards/dryads/totems and then get the titan unit for whatever civilization you are using. (the titan unit is recommended and without you will have to spam LOTs of wizards and hobbits; best bet is to use the titan unit for this level)
 "Balloon in a Wasteland"){kind=icon}
 "Warlords: Call to Arms"){kind=icon}
 "Civilizations Wars"){kind=icon}
 "SHIFT 2"){kind=icon}
 "StarBaron"){kind=icon}
 "Epic War 2"){kind=icon}
 "Hands of War"){kind=icon}