Click to Cast?

I may have a solution. Correct me if I'm wrong but you can limit a players ability to build units, just create a bullshit unit and restrict their ability to build it. The building should still read it as a unit producer and give you the rally point ability

Wait that gives me an idea, there is a building class option if im correct... ^_^

Thanks Xipe!

Actually nevermind I have figured it out...

Event
Unit is issued an order targeting a point

Condition
Order = Right-Click
Ordered Unit = Guard Tower

Action
Order (Ordered Unit) to use (Item carried by (Ordered Unit) in slot (1)) on (Target Point of issued Order)

Only thing is it won't use the ability if you click the enemy unit, but that doesn't really matter to me.

Ahhh, I had just gotten a good solution, DAMN IT ALL!!, why must I be so slow. Oh well your way works too I suppose

Problem solved! Thread closed to avoid spamming!

~Daelin