I bet it was a bug caused by it being given its own steel path region.

What I mean is, if you want to spend your progenitor element and mod slot to get two statuses, you can do better than Impact + Hemorrhage. It’s a small chance stacked on top of a small chance (since even with a 60% progenitor your elements will be diluted on a primer.) Going for something like Magnetic + a Heat 60/60 is just more efficient for priming, because you get status chance and the heat isn’t contingent on getting a magnetic proc.

(It doesn’t help that many of the best melee weapons already proc slash.)

From a lore perspective the sisters of parvos kill lots of tenno, so I assume the Tenet Arca Plasmor is canonically a really strong weapon. I don’t think we ever got any lore about the base form / ambassador.

You don’t need Slash for priming though. As a Condition Overload primer, it only matters that you have a status, not what that status is. So Magnetic + Cold + Radiation is actually better than Slash + Impact, if you intend to use the Nukor to prime.

The only exceptions are Viral, which you always want a lot of, and sometimes Heat (if you’re doing a heat inherit build.)

If you want to use the nukor as a main damage weapon and not a primor, hemorrhage/slash is okay, but the chance of getting a slash proc is so low that you’re better off with a generic build.

Three main reasons:

1. It’s a cheaper mod. Easier to access, easier to max rank.

2. Applying three or more status effects is a lot easier than it sounds. A typical melee has impact, puncture, slash, and some kind of modded element. This means CO will beat other options after a few swings. Some enemies will die before CO reaches its full effect, but you didn’t need the extra damage on them anyway. CO is far more effective than Primed Pressure Point against the biggest and strongest enemies, which are where you need the most help.

3. With a status primer like the Epitaph or Kuva Nukor, CO can produce a far higher damage multiplier than Primed Pressure Point. You can easily get 5+ statuses if you build right, which is a huge damage increase.

Can you tell us their exact words? Screenshots of the support tickets might help, just make sure to black out identifying stuff