>>1587366...thought of a possible way to make the edges softer. Duplicate the layer. Put a gaussian blur filter of about 1-2px on the second layer. Erase the edges of the characters in the first layer.
I'd already tried that on
>>1586807 but hadn't posted since I didn't think it was much of an improvement. (Also un-blurred the heads a trifle.)
But I'll leave it to the judgment of the original requester.