WOW, the last wave was going on way too long! mess my PC so much and made it go so slow XD
How i made it:
First 3 line archers
then 1 line knights (this one have more health then barricade)
and the last 4 you fill with barricades.
(keep buy barricades if to many get destoyed)
Then is the rest up to you
 "Siege Knight"){kind=icon}