Garen's twin assault was dodged by a surprisingly spry backstep on the part of the bone man, irritating that a man in so heavy armor could be so agile. Still, it was information that Garen could process and use. He started circling, wary of another lightning attack. As he circled his opponent his eyes searched for a weakness, obviously there would be gaps were the joints were but those were to obvious weaknesses for Garen to use. No the bone man would be expecting that. 

As he was examining his opponent he saw a woman knock an arrow and fire right at his enemy. It deflected harmlessly of his pauldron of course, but the distraction she cause as the bone man lifted his spear to fire at her was all an experienced fighter needed, and Garen was nothing if not experienced. 

He charged, both blades hanging low. The aim was to shove them both under his arms where his armor would be weakest. As he drew closer out of the corner of his eye he saw another woman start sprinting towards his enemy, blades drawn, obviously seizing the same opportunity. 
He slowed his pace a little, allowing the woman to strike first. at the end of her charge she pounced at the bone man, blades aimed at his neck. Garen himself reached the man rolling partially to the side and thrusting Gwynt right under the bone man's spear aem.