Interesting, but I'd take Feral Spirit instead of silvershield warrior.

Melee attacks can only be done from the first place, unless the monster got sneak. Silvershield warrior doesn't have sneak, so only the Clay Golem can attack and the Silvershield Warrior can't attack until Clay Golem dies.

However, Feral Spirit has sneak and can therefor attack from the position behind Clay Golem, allowing for a higher attack ;)