Yeah, I had a Harasser land both SRM6s on a Fa Shih squad in 1 turn . . . enough Infernos hit to wipe them out. How about A4 Infernos? It will be a MUCH larger risk to Elementals shortly since it is a Capellan munition though they did not use it against the Hell's Horses back during the Jihad.
I do not remember, do that armor help against Plasma? If so, I think Plasma is the bigger threat.