Combined with its inherent Shockwave enchantment, adding Swirling transforms Whirlwind into a weapon that cuts down enemies in its path. Radiance provides extra healing to sustain long winded fights / large groups of mobs. Critical Hit helps provide the extra punch in terms of damage per second and helps mow down bosses. Make sure to couple this iteration of Whirlwind with the Death Cap Mushroom for maximum enchantment procs and additionally a Gong of Weakening to help minimize bosses down to their size!