Made a thread about this so I don't clutter the comments section any further. I made a bunch of new skill icons by pulling art from AoW4's Steam achievements (it was a slow day at work and I got bored). Feel free to use them however you like, only if you're interested of course.

Each icon has had the background masked-out and then exported to a transparent PNG, so they're generally in line with the look of the vanilla icons. I also used sharpen and blur filters to bring Steam's rather low-res icons up to par with AoW4's higher-res icons.

Here's the Google Drive folder with all the icons + source file, check the "Exports PNG" folder for the final exported icons to use.

FILES LINK
https://drive.google.com/drive/folders/1l6Y90SYKLMrR19Y8uoFiU1dlscWf2GYJ?usp=sharing

I have no idea what the dimensions of AoW4's skill icons should be, right now these new icons are 454px by 456px just because that's the size of these Steam achievements once I cropped the background out. Let me know if they should be resized and I'll re-export them at the right dimensions. I'd also be down to color-code these to each class via a simple color overlay or an outline, if that's something you'd be interested in.

One last thing-- Currently only 33 of the 50 AoW4 achievements are included here, but if you're interested in using these icons I'll gladly add in the remainder (it's very easy to do).