you can... There are many methods to accomplish this.
Heres one:
I created an ATG for melee, edited DPS1 within ISBoxer, to include IWT. Wrote a macro for castsequences and put that macro on number 1 and 2.

Press 1, then start spamming 2.

If the mob moves. my spam finger hits 1 then 2 in less than .5 seconds. Incredibly simple and no more swarming of melee groups