Firm Winds
Thunderaan can no longer be pushed aside and takes 50% reduced damage from non heroic sources. He also heals for 1% of his health every time he deals damage.
Hero, of the Storm.
Lasts for 3 seconds now. Cooldown is reset if the target dies during the effect.
Thunderfury, Blessed Blade of the Windseeker.
Your auto attacks will now chain to an enemy, dealing an extra 200 (+10/level) damage, as well as chaining to every nearby enemy (may it be a structure, hero, minion or mercenary) to deal 400 (+15/level) damage. This effect has a 15 seconds cooldown. Cooldown is reduced by 1 second every time you cast Windburst.
Master of Winds
You no longer lose your speed boost after casting wind walk. Wind Walk lasts for 1 more second and you are healed for 5% of your maximum health when you cast it. Enemies are also slightly pushed away when it starts and when it ends, provided that they are within melee range of you.
At all i would say something between your concept and a more traditional Hero would be pretty awesome ( more Displacement over talents/ less in his standard kit) so on large maps he could go off damage or off wave clear, more effectively.
(sry for bad english).