The blue guy is medium cause he has all defensive skills, regen (useless since you can spam heal), armor aura, heal, and revive (cheapest skill - REVIVES ANY UNIT TO FIGHT FOR YOU INCLUDING ENEMY UNITS)
TO get hard badge, you want to ship as much tea as possible. Thats where a huge chunk of your score comes from. Meeting deadlines early or slightly late (90+) means the next shipment will require more tea. This is good, you will make a huge amount of score for making it.
BTW, I almost failed the last shipment with 10 tea lefts, I was broke from just selling at 80+ plus to meet the deadline. The price miraculously dropped to 14, bought 5, then quickly rose back to 80. I thought that the game just screwed me off. Just then, it dropped back to 14 and I managed to waste my last 130 money on a 5 tea pack LOL
 "I Have 1 Day"){kind=icon}
 "The Game Where You Earn So Many Points in Just 10 Steps!"){kind=icon}
 "Pokemon Kill 2"){kind=icon}
 "My Little Army"){kind=icon}
 "DDTank"){kind=icon}
 "Upgrade Complete 2"){kind=icon}
 "Bela Kovacs and The Trail of Blood"){kind=icon}
 "High Tea"){kind=icon}
 "Particle Wars Extreme"){kind=icon}
 "Hands of War 2"){kind=icon}