I am trying to make a targeting system using an alias, so far I've tried:
Target *, for the alias
then
world.SetVariable "Target" , %1

but it doesnt work, any suggestions??

Hmm... I'm not sure if this'll work for you, but you could do it another quick way, just do ST TAR , then have your alias do (I'm using the Staffblast ability as an example. Change according to your weapon) POINT STAFF AT &TAR, then just do whatever the alias was for STAFFBLAST, and you attack!

Make sure you have mushclient send it to SCRIPT rather than WORLD.