On top of the two state of minds which dfmoore26 has already pointed out, Sentry also has "Steadfast Approach" between 20-29 combos. Take note that this happens only 60% of the time, and you can tell when it is activated by the colour of the icon of the fist. He has perfect block/increased heavy attack damage in this state, so you can block with no damage if you don't feel like intercepting/evading when in this state.
Comments
- 15 hit combo
- SP1
- Aggressive Build to SP2
- SP2 while Fury still Active (around 33-35 on combo meter)
- Repeat cycle
Always hit SP1 when Sentry is in "Overpowering Light" State of Mind
Always hit SP2 when Sentry is in "Absolute Strength" State of Mind
Step 2 turn into void with your L3.
Step 3 don’t let him turn back into sentry.
Step 4 Win.
Jk dfmoore has a good idea of what to do.