This may be heretical and some may call me out but the easy to get and solid Vibra Pulse is far better on Wilhelm against the Sentinel than a Shock Rosie.
Why do I say this?
Number of Deaths.
In a series of fights against the sentinel with a laser specked Wilhelm, I won EVERY time using the Vibra Pulse. Yes it took longer but I was near invincible with an Adaptive Shield and Heat Sinks with Hard to Kill fully specked. I believe the Vibra Pulse simply allowed me to continue to beat Healthgate throughout the fights.
I switched to a Shock Rosie and while the fight I won was over fairly quickly…I lost three before I won that fight. Plus, the Rosie jumps around like a chicken with its head cut off. It’s damned hard to hit anything with accuracy.
As a side note: If you are good with a Hail as well,…you DO become invincible LOL.