why? at those levels you don't even need those ^^
you have to play smart ^^
a few tips for freedom islands
1) START FIRST *(horseman are perfect for this)
2) always bring inqi's/ archimages/horseman in your army (the rest is subsitute with whatever u have) personally i would say shaman or evil beholder(evil beholder got a nice ability putting enemies to sleep and shaman got nice totems
3)if u got no gift or resu last hero is your man
4) slowing an enemy is sometimes better than killing it asap