For example, I want the phase disruptor to target building only, but I want it as an attack, not a spell...

I messed around with orders.dat, but it didn't come out right...

Impossible.

waiting for shadowflare to confirm this...

lol, I don't really know.

I think there's a way to make it damage only buildings, but I'm pretty sure it will fire on everything. Try messing with the targeting flags in weapons.dat. Honestly I've never seen it done before so I'm going to guess that setting only the building targeting flag will either not work or cause a crash.

I used an unused order for directing targeting rules, in this case place COP, but I literally copied everything from attack order, other than the targeting rule, and in unit.dat ai action I directed a unit's attack order to that order, the result was suprising, the unit actually followed the targeting rules, in this case it avoided attacking robotic units, but when I order it to attack organic units, instead of attacking, it performed a teleoport... place COP...

I wonder if it would be possible to create a Blink spell using that method. Will check it out.

there are several problems with that method, 1, the unit loses all the buttons after it's blinked and 2, refer to #1, and 3, the unit can be placed anywhere rather than just a short distance away from it's current location.