Recommendations for Reducing Body Roll?

[ctsround3]

Alright so I searched and didn't find much on this topic in particular. I don't need a "how to make my car auto-x ready" response because this is my DD. Here's the specs:

2009 Yaris 3 door, manual 1.5L

-Tein S-Techs
-Tokico Blues
-TRD rear sway bar
-Konig Feather 16x7's on 205/50's.

In hard cornering, I get a tremendous amount of body roll toward the front. Being lowered, the body roll results in tire rub on whichever side the weight is shifted. My suspension setup has less than 1,000 miles on it since install.

What is the next step for me in stiffening up my suspension to reduce body roll? Strut tower bar? Mid braces? Thanks in advance to anyone with personal experience or advice!