Hi,

It's one step, like this:

AssistMe (hotkey : 2)

Step 1 of 1
F10 -> all other (note: tried all, just window 2, etc. Same results)
F8 -> all other


F10 is mapped in game to target team member 1 (my main)
F8 is mapped to target's target.

Just played for a couple hours and at no time did 1 click work.

Same with heals. For example, I have:

HealME (hotkey "3")

Step 1 of 1
F10 -> 2 (my healer's window targets party 1)
F6 -> 2 (my healer's F6 casts big heal)

When I hit "3", he will target me, but his heal often goes to last person he had targeted, so I have to click it twice to get the heal.