Defense. Counter... It's hard with light armor.
Power Theatrics have at least medium armor to be "defensive". And even with this armor it's hard sometimes to stand on the feet. When You catch a Rampage, for example.
These Dirty Tricks, Vanish, Unfair Advantage must be very useful to stand. I mean.

Or, perhaps, we need the Blazing Speed on the Shadows tree... Let's see. :)