They only steal arrows if the archer is within their movement range! And what will you do, attack the archer or steal mana? I think attack! But that's not important! Usually, the player has a cart with ammunition! So, the ability is useless! Ghosts are better! They steal mana when they attack and use it to restore their health! But still, the Master Archer's bonus wins 8 times out of 10! The ghosts won 2 times, and they were left with 1 and 2 units (tested without magic and any abilities at the first level)!:smile01:
P.S. I can't imagine an elf army without archers; I play calmly without ghosts!!!