Well, the Fire Elemental Power weapon enchantment would be what would allow me to summon the elemental, and as a Synergy property requires the Flaming or Flaming Burst enchantment already be present; thus, the idea was to activate Sacred Planar Lash to give my Tempest Lash the Flaming and Fire Elemental Power abilities. The ability can only be used once per day, but each time I use Sacred Planar Lash is like getting a new magic weapon. Unless Quill said otherwise, I'd say there's little harm in allowing me to use limited abilities more times per day. Due to the 1d4 round wait time for using Tempest Techniques, and the required standard action to use them, I could hardly spam anything ridiculous.
My first idea, which I mentioned earlier, was to use the same ability to add Dispelling and Greater Dispelling to my Tempest Lash (as the ability is present in the Magic Item Compendium), though it only functions as a targeted Dispel. Not quite as useful in this case.