I'd go with all of the above, but if that's not how you feel, go with the Vortex+Blades, and here's why, for whatever charge of Blades you have gotten, it will make that many blades for every enemy in the Vortex ex: You charge up enough that the basic blade count is 8, and you have vortex, with every enemy, say hobbes (there are 4) there will be 8 blades for each of them, sending out a total of 32 powerful blades, while they are cartwheeling through the wind! Figured out the combo when going for the Archmage achievement ^_^