Key remapping question

[Ñightsham]

The Oculus (Heroic): Ley-Guardian

I'm unsure how to setup (remap) the keys for getting the drakes to fire at the same time?

I'm using the tactic of having the my healer stay near the loot chest, dropping totems and mount the other 4 toons up on their Ruby Drakes. My drakes follow and such, however...... when attacking Ley only my main responds, the other 3 don't attack. I know I have to remap, just not sure how to go about it.
I'm using ISBoxer {FTL} setup

[Ñightsham]

......I guess I could just use the following:

/click [target=vehicle,exists] VehicleMenuBarActionButton1
/click [target=vehicle,exists] VehicleMenuBarActionButton2