Since you need minimum one troops for allies, I'd go with daemonettes, they are seriously quite fierce in the new book for their points, chew through most everything with ease with a 20 model unit, even without a herald.
But, you could have 1 unit of daemonettes, and one fast attack unit of furies in your allies, with a slaanesh herald as the mandatory
HQ to buff the daemonettes. That way, you can deep strike the daemonettes, and let the furies use their mad movement (12 inch movement phase,
d6+3 run) To get where you need them