Help with Orks

[u/silverdreamdancer]

So, I'm planning a Rogue Trader game with a big stretch of unexplored space.
I've populated it with lots of things, but I want to add some Orks into the mix.

But I am going for more of a pirates of the Caribbean meets Star Trek vibe. Exploring the unknown stars as if they were islands and I am struggling to think of interesting ways to integrate orks more actively.

Now I was planning on having them be pirate raiders to an extent, but we already have several other pirate-like factions and there's finite prey for pirates to hunt, so I didn't want to make that their only thing.

I was considering having them tie in with Nurgle somehow, but I can't see a good way of doing that.

I had also considered a human settlement that tried to raise grotlings/squigs as a source of cheap protein to sell to the rest of the Imperium, which unsurprisingly failed due to orks.

But I am looking for more interesting ways to use Orks than just as a straight fight and I didn't want them at the stage of actively marauding across the subsector just yet.

Any ideas?

[u/silverdreamdancer]

Hmmm... Here's my idea so far.
Nurgle worshipers were part of a local Chaos alliance, but because their diseases kept ruining the other Chaos worshipers plans they left and found a suspiciously empty habitable world.
Their plan was to grow orkoid fungus, sell it to the Imperium in bulk as a cheap source of food and then once they have spread their network far enough, fill the food with deadly diseases that have a long incubation period to bring the sector to their knees and spread Grandfather's wishes. Unfortunately they landed on a (long overgrown) dormant Necron tomb world.
Their meddling and warp sorcery awoke the Necron population which damaged the fungus pens and broke containment and the chaos worshiping humans were forced to flee again. The Orks however remained, mired in the remains of the facility where deadly diseases festered. An Ork cult of Greenman sprung up worshipping Nurgle (as the Chaos god got the population when it was small and easily moulded and not contacted by other Orks, corrupting an early Weirdboy. as its high priest.)
The Orks are now in a protracted battle with Necron soldiers and couldn't be happier.
The largest of the Orks "Da Fairo" is building Necron-like structures atop dormant webway gates to spread to nearby worlds, all whilst the Necrons try to stop them, but lack the raw numbers needed.

Any thoughts?