"240H" – unlocking new heroes and improving existing ones.

Yes, that's the one. I just don't know how to make the golems move their legs while moving. If you give them a move animation, they'll start running away from their posts...

Just one option. At least, that's what I know... You need to remove the animation from Razak! And you can't just do it by deleting the code. There are two options:
1. Extract his mesh from the game into a 3D editor. And re-import it, but without the skeleton (Psathi's tutorial will help).
It doesn't work for me; the texture coordinates aren't saved. But it might be because I'm using an old version of Maya or because there's a missing script... Anyway, I didn't bother with this method.
The second option is easier for me: rip the model, run it through a 3D program, and import it into the game using the map editor. By the way, it's easier to rip in the map editor; I've tested it. I use Ninja Ripper. It's easy to find online. You'll also need a script for 3ds Max. It only works with it. So, download the ripper along with the script. It's easy to work with; you'll figure it out in a few minutes.
So, you'll get Razak without animation and a skeleton. But you can only assign this model to Lod files, and use the standard one for combat, since the golems will just be standing there anyway. That's it. Sometimes, simply deleting the code in the animation might work, for example, with Duncan; his mesh matches the standing animation, but most often, heroes have a T-pose, i.e., without animation, they will spread their arms or something else... It won't look good, though.
Go for it! But your golems still won't walk in sync, or rather, they won't move their arms. You'll need to change the animations of the golems themselves for that, but they will still walk in step.
And finally, Razak should, of course, be an effect! One of the golems is the model!

Added 28 minutes ago
Oh... I've got an idea. You need to remove the necessary arms from the golems' animations, and then everything will be as it should be. In the same way, extract the model, take the arms, and attach them to some inactive bone. If the right and left arms are different, you can always mirror the one you need in a 3D program, but you probably know that already... So, mirror it, for example, for the golems on the left, and attach it with effects. Thus, the right ones will have one arm attached, and the left ones will have two. Everything will be symmetrical and beautiful. You can even keep the weapon in their hands and don't need to remove it. In general, everything is feasible!

Added 10 minutes ago
Or even simpler: mirror the entire golem, but attach everything above the waist to the active part (legs). This will be even faster and without much hassle. Only the animations above the torso will be lost. You can implement it; it would be interesting to see!