While creating some artwork for an article, I ran into an interesting anti aliasing Illustrator feature. That might be handy for you to know. Exporting images for web („Save for web”) uses Cmd-Opt-Shift-S shortcut (Ctrl-Alt-Shift-S on Windows). This brings the following screen:
You have three anti aliasing Illustrator options for the look of your exported artwork:
In my opinion, the best for this kind of images is the third above, „Type Optimized”. This removes the anti aliasing Illustrator effect and renders text with some optimization. Feel free to use. A quick hint.