Working off a few assumptions here about Shoretroopers. Assuming you need to take a unit of shores per mortar, and mortars are a corps unit, and the mortar is a 4+ range suppressive weapon, we can do something like
Krennic
Bossk
2x Shoretroopers
2x Mortars
2x Storms w/DLT
2x Deathtroopers with focus fire config
2x sniper strike teams
That gives us 27 points to play with for further upgrades, or could cut one of the Storms to free up another 68. Really depends what the shores have for heavy options I suppose.
Basically what we've got here is 12 activations that just throw buckets of suppression on the table. We can match a wonder twins/z6 spam list in activations and hopefully pull ahead with superior action economy. A list like this would be very soft to vehicles, but if it works the way that I'm hoping, there may be a bit of an RPS element to the metagame. Mass suppression beats trooper spam, vehicles beats mass suppression, trooper spam beats vehicles.