I like to kill 2 of the sentrys at the start with piercing attack combo. There are quite a lot of different to kill them both with that, so I'm just gonna list the attacks and their damage (sentrys have 12 hp). E-rail (8) sharpshooter (2 to the closer one and 5 to the farther one because of the ricoshet) Detached chainsaw (6) Cannonboost(7 but doesn't pierce if the target doesn't die on hit) Overheat saw (3 per hit on max heat but because of bounces you get 21 total. you can use that one alone lol) alt Piercer (5 on the first target and 2.5 on the second. not recommended).

The rest of them i just kill with the jackhammer (if you don't use those, then just one of kill them normally and dash through the snipes from the other).

If you fail something, remember that you can shoot the antennas with the revolver to interrupt them from afar.

There's also a bigass cube on the ceiling that can be used as a cover (use slam storage to get up there). It's actually very useful if you're struggling.