Pixel Perfect 1px font outline

[gempir]

So I'm wondering how I could achieve a pixel perfect outline on font strings.

An exmaple are these unitframes:



On the left side i'm using a shadow with 1, -1 offset. On the right side (target) I'm just using "THINOUTLINE" sadly THINOUTLINE looks really mushy and not as crisp as I want it to be. Without the outline it looks clean so I don't think font scaling is an issue. How can I achieve a clean 1 px black outline on my font?

The shadow is nice but its after all still a shadow and not an outline, which means only one side is covered here.