Ye i used the Endringgers as flanking, to do some MW with Drill cannons.
When the frontline got stalled into my Ironclad, i used Endringgers for Objective taking ,Or pew pew from afar for run and gun.
They also function as Finish killer, at hero's that was out of reach. assuming they will survive the charge.
PS: really good point on the "Last Word", thought of it, but i some how forgot ;(