Staff Build Question

Would it be worth (as far as end game power) it to six link and build this around the fire gems in the game? Or is it simply a vendor rare? I'm thinking a Templar elemental build (molten strike/inferno Blow).

Vendor trash.
Gem levels on attack skills isn't very good right now. However act 4 promises to change that, since skills will then start scaling as "more" multipliers instead of as "increases" as gems level. Of course until I know what those numbers look like, it's hard to say whether a +2 melee gems with +2 fire gems mod would be any good for something like Molten Strike.

That said, flat elemental damage on slow 2h weapons isn't good for elemental attacker builds. You're still better off rolling physical damage.

Lastly, Searing Touch is flat-out better for casters.
http://pathofexile.gamepedia.com/Searing_Touch

thanks!