I've not too often used Heavy Stormtroopers in campaign, but I'm planning on bringing them to my next mission, and it looks like it might spell disaster for my Rebels.
A couple of notes:
1) I'm using the Armored Onslaught class
2) Heroes have earned rEchobase Troopers, but my plan does not hinge on whether or not they bring them. In fact, bringing them helps, but is not necessary.
Basically, here's the deal- After the first Rebel activation, I'm hoping, and assuming that out of all of the Imperial targets available, my rHeavy Stormtroopers (who I'm bringing in as an open group, at the optional deployment at the beginning of the mission) are still around. The first one, already in range of the Rebel Heroes, will call in a Mortar, dealing up to 3 damage to each hero/ally on or adjacent to the space called in on. Then, I'll have that heavy and the other one in the squad attack, also utilizing Explosive Munitions. That's a total of Blast 3 if all targets hit, plus whatever damage the mortar does. In a best case scenario, I could have dealt 6 damage to up to 3 Rebel heroes (assuming the first to activate didn't move too far) and possibly allies if they brought them... plus, the direct damage from the heavies attacks, which we haven't even accounted for yet. All within my first activation.
Seems pretty brutal to me. Granted, I'd imagine my Rebels will quickly try to spread out to avoid this happening again, but that's some pretty serious damage that they're going to have to deal with. Also, I totally realize this is a best case scenario, but even if I manage to get 3-4 splash damage plus some direct attack damage on multiple heroes in a single activation I'll be happy.
I just find it interesting that I've never tried this rather obvious strategy before. I wonder why Heavy Stormtroopers don't seem as popular as the other standard stormtrooper.