Hi Jaro,
Thanks for your patience. Our product team has completed the analysis of WORDSNET-13010. Please note that ImageSaveOption.Resolution simply determines the size of the output image in pixels and have almost nothing to do with the device resolution. So if higher ImageSaveOption.Resolution will produce better quality with acceptable performance/image size then there is nothing wrong to use it even on devices with 96 dpi.
Aspose.Words have the methods Document.RenderToSize and Document.RenderToScale which accepts user Graphics object. So you can set any TextRenderingHint you want and then save Graphics object to the image. We suggest you please use Document.RenderToSize or Document.RenderToScale method. Hope this helps you.