Pixel editing is allowed practice, but one that requires work in progress images to be attached, at least until section gets familiar with author and his displayed style.
This one and
this icon are your best works so far. I see you are going after
wc3 feeling with your icons quite successfully. I often say that distinctive style of outlines and shapes play major role in looks of in-game icons. These icons for example:
Notice the contrast value and the outlines that are subtle, but still give a great definition to shapes, with contours being sharp. I also suggest you to study the textures and analyze the ones with similar style to icons.
Approved.