While I understand the power of the AI, you still should do some effort on editing the result (a lot of effort)
Here is an edit of your Frost Shield 2
The intention here was to nudge it towards a more SD style
Many of these shields look like they had initially a very high resolution and the details get really clustered together a lot, also IMHO they do not fit the warcraft 3 theme over all, do not look SD and just look AI generated.SD icons.
Here is an edit of your Frost Shield 2
The intention here was to nudge it towards a more SD style