Radahn VS Charge attack build -- No Summons Necessary.

Flame Art Golem Halberd +7, axe talisman, charge attack+strength crystal-tear. Running far to the left causes him to lose track of you, then go toward the beach for a ways, then go towards Radahn, and he will get a lock onto you but will draw his swords and approach you instead of using his bow. From there, its just a normal Souls bossfight.