i have problems with all kinds of troops but slingers are the dumbest buch of retards this side of persia. i mean the slingers i have used run around in damn circles shoot my own units and charge into enemy units when in skirmish mode
then while the enemy are cuttin' up your men the slingers finally descide to shoot here enemies exactly 3 inches from your face
anyway refrain from using them enywhere but on the flanks shootin the enemies attacking your front lines.