Invis rune should give a smoke as well

It's by far the worst rune. It's clearly designed to be used to gank, however both side lanes are heavily sentried early, and only increases from there. I probably die with it more often than I get a kill, because I think I might be able to gank and i'm seen and am in a bad position. It should give a charge of smoke as well, instead of the weird damage reduction. It's even more useless late game.