what to add?

Elemental Attunement is a waste of an elite skill slot, I cannot imagine you running out of energy on that bar in PvE, unless you're just spamming hammer on recharge and everything else inbetween =/ Basically if you rearrange things, take out ele attunement, put in a glyph of lesser and swap out another skill for a better Air elite, you could have a much more effective skill bar. Maybe something like Invoke Lightning or Mind Shock =] Actually, elemental attunement is a very good idea on this bar because it lets you, as you mentioned yourself, spam your skills on recharge. Lightning hammer, Lightning orb and Blinding flash are all very powerful skills, even moreso when you can spam it to your hearts content.

I've run a very similar build myself, and I found all I needed for offense was lightning hammer and lightning orb, then blinding flash for blinding everything. So I'd say switch out lightning strike, lightning javelin or enervating charge with something doing a completely different purpose. You've got your damage, energy management and melee hate on the bar, what else do you need? For instance, for AB I'd bring [aura of restoration] (generally not a good choice for a selfheal, but when spamming 25e and 15e spells, it's pretty useful) and [Storm Djinn's Haste].