Wasting a decent amount of rage. Make sure you're using IP when you hit 70+ rage to prevent overcapping.
Revengeing WAY too much. The priority is as follows:
If you have 2 charges of TB, cast TB. If you have <2 charges you SS. If SS is on CD you cast TB/TC to attempt to reset it. If SS and TB and TC are all on CD, and Execute is unavailable, then you press revenge.
SB uptime is pretty low. You want 95%+ and you're at 80%.
You should be utilizing Execute more, when it's available as well. Basically, when you would overcap on rage (and you'd normally hit IP) you want to cast Execute when its available. Execute does an incredible amount of damage right now