The Elders attacked Sam from all sides. But most of them are coming from their left side. With his right leg being a peg leg and the left hand not even present, it is indeed a very good spot for them to attack him from.
While the elders from this side are focusing on him, the rest of the elders are focusing on taking his staff down. They wholeheartedly believed that his bizarre attacks are coming from the staff itself.
But most of Sam's focus is on the long-ranged attacks.
He dodged a dagger strike from the left barely and waved his staff a bit. An inclined energy barrier appeared in front of him and a large fireball coming from an elder far away hit the barrier and moved upwards as if it is a ramp.