Here's my build to maximise the damage for the sentinal. I'll go over a few choices.

We're using Rime rounds over Primed cryo for the status and lower cold damage so we can increase the heat damage to proc more often. With 1.8-3.3 multi shot and 22.8 fire rate you're looking at 41.04 to 75.24 instances of damage per second. With 40.54% of the damage being heat and 122.4 status chance we have 49.62% chance to apply heat status per shot on average which is 20.36 - 37.33 heat procs per second depending on Galv Chamber stacks.

Basically im running this similar to how I run my [Phantasma Prime], except i run corrosive in that build instead of viral (no innate cold forcing it) .

PS: The mod polarities are so you can mess around with the builds. Madurai is a more unviersal slot.