>Here's a point that I ran across: these long range missiles are there to take out air defences and such (along with stealth sorties), which allows you go go in with 'regular' ordinance and non-stealth aircraft—of which there is much higher quantities and availability—in later phases.
ATACMS and PrSM would definitely be used to strike air defense systems. The US military is very joint and the boundary you're delineating isn't part of the mission tasking.
Not ATACMS. SEAD is an Air Force/Navy activity.