All you need is 1 stack of paladins and 1 stack of zombies and you can get 3 turns. Like this:-
Archers attack.
Paladins attack.
Cast phantom on paladins or zombies stack.
Next unit to act (either phantom or zombie) cast 2nd wind on archers.
Then next unit to act casts 2nd wind on original Paladin stack.
Archers take 2nd turn to attack.
Original Paladin stack casts 2nd(3rd?) wind on archers.
Bingo!
At least in theory anyway! It's 2 am here and i'm going to bed.
