Restless Dead Level Help

Level Help
1

How can I do without a Paladin in the Restless Dead Level?

Where do I go wrong in my code? 
summonTypes = ['soldier']


def attack(enemy):
    if enemy:
        while (enemy.health > 0):
            if (hero.distanceTo(enemy) > 10):
                hero.move(enemy.pos)
            elif hero.isReady("bash"):
                hero.bash(enemy)
            elif hero.canCast('chain-lightning', enemy):
                hero.cast('chain-lightning', enemy)
            elif hero.isReady("warcry"):
                hero.warcry()
            else:
                hero.attack(enemy)


def summonTroops():
    type = summonTypes[len(hero.built) % len(summonTypes)]
    if hero.gold > hero.costOf(type):
        hero.summon(type)



def commandTroops():
    for i, friend in enumerate(hero.findFriends()):
        if friend.type == 'soldier':
            Command(friend)



def Command(friend):
    enemy = friend.findNearestEnemy()
    if friend.type == "soldier":
        hero.command(friend, "attack", enemy)


def collectItems():
    item = hero.findNearestItem()
    while item:
        hero.move(item.pos)
        item = hero.findNearestItem()


hero.moveXY(55, 10)
hero.wait(2)
attack(hero.findNearestEnemy())
collectItems()
hero.moveXY(55, 33)
hero.moveXY(49, 37)
hero.moveXY(19, 40)
hero.moveXY(55, 48)
for i in range(1, 20):
    summonTroops()
commandTroops()
while True:
    attack(hero.findNearestEnemy())
    commandTroops()
    collectItems()