Maxing W makes you the king of mid though. Low mana mids like DK and Magnus will actually have such a small mana pool they can't cast spells. Int mids will be affected by the mana loss but will suffer heavily from losing damage, or rather giving it to you.
Aura does buff your mana pool which in turn buffs your orb that you never have to turn off because of the Aura. Your build was does do a ton of right click damage at least.
i dont like my username. so please just call me Mark "Always 1A" Minigun. TI3 LETS GO.