First off just to make sure there is no confusion. What is DS and SS?
As for "Assault Shuttle LV" or at least a combination of weapon that is capable of bombard the population without hurting Climate Hazard like Siege Drivers does is what I would like to see out of invasion, not "scorch earth tactics" invasion. Right now the assault shuttle mount are in conflict with existing siege driver mount because they accomplish bombard very differently. Siege driver don't care if the planet remain habitation after the bombard meanwhile assault shuttle do. To be fair I can see siege driver being used against satellites or starbases since they don't move.
I know I can order siege driver to not fire all the time but then I feel like it is a waste of two siege driver if I never want to use them in a bombardment. So instead I would use another LV with more Climate Hazard friendly mounts. As a result I don't use invasion LV for planet bombardment at all. Actually there is one case where I would use invasion LV as it is freely but that is a fringe case. Because Loa don't use climate hazard to colonization then you can freely push climate hazard around as much you want. But then I just remember that Loa have problem with using LV at FTL speed due to NPG limit so the whole thing is moot at best until they add in optional FTL usage.
Interesting the SotS 2 Rorschach wikipedia don't have weapon damage listed for siege driver or assault shuttle. I will use SotS prime's siege driver and advance assault shuttle weapon data instead.
Adv. Assault Shuttle: Terraform damage - zero points, Population damage - 1.2 million
Siege Driver: Terraform damage - 100 points, Population - 150 million
It just list terraform damage and I don't know how that translate into climate hazard rate. Keep in mind both weapons can be use more than once. I don't recall how many assault shuttle mounts exist on invasion LV. I was just surprise that there was not a new assault shuttle type to take advantage of LV enormous size more than anything.