Next version of ToME will feature "tiles attachements". They are pixel-precise (but resolution independent) ways to attach particle effects and such to a tile.
For example this allows fiery hands to actually have small burning spheres positioned on the hands of the character. Or fire wings to sprout from the shoulder boneblades.
This addon lets tileset creators define the attachement spots for their own tiles. The spots for the default tiles were also done with it so it works quite fine

The interface will load the list of all possible tiles and then you can simply left click on the image to assign spots in order. Right click to remove in reverse order or press 1/2/3/4/5/6 to assign a specific spot.