for the last level create two physics labs, a starport making super carriers and for safety surround your base with barricades if you like. (one layer is perfectly enough as your carriers kick ass) Its a 100% success rate (unless you've done something wrong)
doc ur being silly u can breed elites+ 75% chance by using 4syigls which can be crafted in alab loads of players have great pets and havnt payed a penny
What could be an epic idea is that the characters have special abilities or powerups. For example Vader has something like droid support or for binja something like ninja teleport and for ease of use hey can be assigned to a specific key like shift :D + if you agree!
I would love to see a priority option, say the strongest enemy around, a soldier. Its quite annoying when the zombies are trying to chase civilians and are getting the crap shot out of themselves by guards :/