Soldier A "Hey i have a great idea. Lets do exactly the opposite of what our commander wants us to do."
Soldier B "Jeah great idea! But arent we doing this all the time? Doesnt it get boring?"
Soldier A "No, the more we do it the more the fun!"
Hm i bought one Astyl. Now if i wanna duel wield i have to pay for 2 more ... that sucks. Why i cant use the first one and only need to buy a second one instead of 2 new?
And ofc the spears work in the normal games or in the challenges where lvl 5 upgrades are allowed. But the reserves only use the spears while they arent stuck in a melee fight
The reason why spears dont work on the challenges is, that the upgrades are blocked to a limited level. It's shown in the Challenge "Upgrade max lvl X". All upgrades above the level X arent working in this challenge
Mattbat: All air fires on the first Tower available in range. So every tower is Tank if you place it in front of the air before all other towers. Just use 3 shield towers next to each other and they get only 70% (50% on level 2) of the damage so they are pretty good tanks too. At lvl 3 they even destroy missiles and bombs.
Tribedoh: There is exploit you can use. Sell the Air Support and build it again, than Airstrike cooldown is gone and you can do multiple Airstrikes with this Strategy. Needs some Money but for one wave its okay. Or do mass mounted guns and some stun guns to slow. Cannons should be next to Gate.
guys you know you dont have to kill the flying fortress or the choppers. you just have to survive ... dont buy any aa towers and sell the damaged towers some seconds before they get destroyed from last missile and buy them again. so you loose only some money in the 2 air waves in lvl 8
 "Epic Stand"){kind=icon}
 "Burrito Bison Revenge"){kind=icon}
 "DuckLife 4"){kind=icon}
 "Necronator 2"){kind=icon}
 "Mission in Space : the lost colony"){kind=icon}
 "Accelerator"){kind=icon}
 "Red Planet"){kind=icon}
 "Hands of War Tower Defense"){kind=icon}
 "The Ocean Around Me - Week Two"){kind=icon}
 "Dibbles 2: Winter Woes"){kind=icon}
 "The Ocean Around Me - Week One"){kind=icon}
 "Kingdom Rush"){kind=icon}
 "Color Link-a-Pix Light Vol 1"){kind=icon}
 "Canyon Defense 2"){kind=icon}