I've tried all three of the current super weapons.
Deliverance engine is a joke.
Vasari superweapon doesn't effect starbases or ships.
Novalith only bombards planets
So here's some additional suggestions:
Advent:
Allow it to target ANY gravity well. If culture is about to knock out one of your planets, why not shoot the deliverance engine at your own planet? If you're in a gravity well that doesn't have a planet and you're in the middle of a fight, why not target the gravity well to boost local culture and give you a damage/whatever bonus?
Additional weapons.
limited range beam cannon (by limited, I mean a single phase jump within a planetary system)
Next planet over is under attack. Allow the deliverance engine to fire a powerful beam at the opposing fleet. 1000 damage to a capital if hit, destroys any frigate if hit, works like the purification beam on the advent battleship. This damage is upgradable.
TEC:
The novalith fires a big wonking projectile at a planet. Structures around that planet don't exactly move. Allow structures and starbases and whatnot to be targetable up to a phase jump away. It would give a reason to build a forward novalith at the loss of forward defenses, depending on your passive or aggressive play style. The damage to structures and planet are upgradable.
Vasari:
They have the best superweapon. In the same manner, allow it to be used up to a phase jump away for anti-ship in a localized manually targeted area.
All secondary abilities are manual targeting only---no autocast.
All of these would add to strategic uses. I rarely use superweapons, but secondary abilities would certainly add to gameplay imo.
Your thoughts...?