the 193px X 193px picture will auto resize to small pixel picture. Then the picture will become ugly.
Small meaning, 50x50 or something like that? And you already had difficulty making it look good 193x193?
One thing that can help is toning down the jaggies as you shrink the image to 193x193. Do it in steps. 4000 to 2000, blur, sharpen, clean up, make it look clean. 2000 to 1000, and again. There are also programs that say they can improve resizing down (another from fixerlabs.com about resizing up). There should be actions avail for PS to do this. Keep a slight blur, a light general 'denoise' from something like Neat Image, blended in at only 10% or so. Otherwise, if you have clean, very sharp jaggies for the 'perfect' image at 193x193, it probably won't be very 'perfect' at any other resolution, larger or smaller.