Hmm... I'm not sure how to make regular units more resistant to knock down. Thats part of the reason I was suggesting to make them heroes but either way Ill start a new campaign and try out the changes. Thanks for giving it a shot :)

...and a (partial) fix is out now. I tried, but I can't seem to make them immune to knockbacks. If anyone knows of some ability or something that would help with this, please let me know.
What I DID do was heavily increase their weapon damage, so that they will have a much higher chance of winning, even if they're getting tossed around like rag-dolls. It may not look pretty, but a win is a win.

Thank you for taking the time to comment.
I have noticed the issues you mention, and fixes are currently in the works. I'm not 100% sure I'll be able to stop them getting knocked around so much (their weight is already set to the highest setting, which makes no sense), but I can adjust their stats/abilities so that they will be capable of winning despite this.
I will be doing my best to ensure the next fix doesn't ruin campaigns, so everyone keep an eye out and let me know if an update screws with your save.

Okay so First off awesome unit! All of them are really cool. But there are some downsides. Your goal seems to have been to make a strong single entity unit and they def are but also they aren't. They have very low weapon strength, lower than even trolls. They have pretty much no mass so they get knocked around like rag dolls. The abilities and passives are very powerful but it doesn't seem the make up for how weak they are with out all the abilities up. The mass problem is particularly bad for the horseman unit, luckily the MASSIVE charge bonus makes up for the lack of weapon strength but the low mass make it hard to punch through even light infantry. I feel if they had less power allocated to their abilities and more into their core stats they would be significantly better. Possible making them into heroes, maybe even legendary heroes, with a hero stat-line would be better. They are really cool so dont think that im hating on them, i love them I just think they can be improved.

Reverted to the previous version, before the latest update. Honestly, the changes weren't significant enough to justify screwing up peoples' campaigns.

after the last update the game crashes when load a save game can you fix this please?

Rolled out some small changes. Details in the changelog, but long story short: they're cheaper, and their combat performance has been slightly improved.

I've been thinking about putting them all into a collection, but I'm gonna hold off for a bit. I'm not 100% sure I'm done making units for this faction. When I am, a collection will be put together.
They're all already compatible with each other, so you can just download all 5 units without them being bundled together.

Cool. Can you make mode collection?

Legally, there's nothing tying them together but a (non-trademarked/copyrighted) name. I've built them only from assets that are found in Warhammer 2, so they got nothing. If I copied armor designs, or made custom abilities that copied spells from Warcraft, then I'd be worried. Good lookin' out, though.

I'd be careful about letting other IPs influence mods on the workshop. That's one of the restrictions GW gave Steam for there to even be a workshop. And They've been firing off bolters like its the Horus Heresy lately.