Some feedback for you, I've helped a couple people over the last day or two that set this up incorrectly.

In your instructions where you create the Do Mapped Key Action for FTL Assist Me, you didn't mention that the target must be Window:Current. The guy I just helped had it set to Window:All w/ Current and this makes each of your toons tell everyone to assist him (meaning it's a toss-up what everyone will end up targeting).

Also, anyone who's creating a toggle to go between the 2 step and one of the original DPS buttons, make sure you go into the Advanced tab of whichever of these keys is to be off by default and check the "Do not load" box at the bottom. This will set that particular mapped key to be OFF by default, as if done via a Mapped Key State Action when the Key Map is enabled. Otherwise you may have both of them enabled until you hit your toggle the first time.