That script loops your clicks when you click and hold the bound button, z in this case, which fails the 1:1 rule. I might be over cautious but I wouldn't use that script.

I've used and still using something similar to this from account creation to max without any problems:
z::
MouseClick left,,,,, D
Keywait, z, U
MouseClick left,,,,, U
return

the one is the legal version. The one you posted makes it bannable but you'd give away.

Try to hold and drag something with your version. You've changed how your mouse switch works. Did Jagex approve that?

Your hands are off the mouse and just pressing zzzzzzzzzzzzz x to open invent everything else normal unless there's something I dont understand.. It at least mimics mousekeys. What do you mean by hold and drag something? My script are just key rebinds.

U CANNOT CHANGE MOUSE BUTTUNS or its bannable simple

Not true. Mouse keys are allowed and has been confirmed by Jagex many times.