A build that builds up to 12x combo then spams heavy attacks thanks to 90% combo efficiency. Because Gunblades double dip with combo count chance mods, the [Redeemer] with [True Punishment] builds 20 combo per shot as opposed to 5 without. This lets you build to 12x almost instantaneously, then you can spam heavy attacks which only consume a maximum of 22 combo - barely more than what you'd build with 1 shot! And since the first attack of High Noon's E combo shoots twice, spamming light attack -> heavy attack will let you build combo faster than you deplete it.

Status is not necessary as the [Redeemer] at 12x combo deals so much upfront damage that it one shots level 100+ heavy Grineer.

Replace [Reflex Coil] with Amalgam Organ Shatter if you have Rank 4 Zenurik's Inner Might.

A video that demonstrates the build in action (sort of):
https://www.youtube.com/watch?v=ASk7djGijUs
As you can see it 2HKOs Level 105 Corrupted Heavy Gunner (OHKO with a headshot) even without ANY base damage mods.