How come Aura Blade doesn't have a buff icon?

[The Legendary Joe]

It's the same way with mystic amplification on Hi-wizzies.

As for that, I think we'd need to pick a buff sprite, and recode the skill(s) so they do show a buff icon. Aura blade has always confused me, I've never been able to tell when it's duration has run out except by watching my damage or sitting there and doing nothing but watching the clock.