you can only see it when you first cast the skill but if you go off the screen and come back you cant see the effect on the target anymore an all you got is to spawn the fixed stigma effect /Invisibility/etc .
the other option is to open the magiceffect.ini find the right skill effect name and spawn it to the screen based on the skill level but its considered much more work for the server to do and its not worth it tho .
fixed ? oh well