Does it really need nerfing tho, being a strictly endgame thing? But these morale nerfs would make it more climatic, I guess...
I see your point. Can I consider it a legal cheat?
Morale nerfs of course will make it more restricted-usage weapon, but in the other hand - why indeed would it be a Star-God-battering-weapon? Is it a technology that surpasses Star God magic? Is it unknown to them?
What is the history of that weapon? Should be there some blood magic lock that makes it useless until the specific research?
From the player point of view it looks like: in the serious base mid-game defense you have to equip 15-25 dogs with activated explosive satchels (e.g. marsec strike or mercenaries strike with plasma/gauss weapons). And most of them move on a suicide. But the single Impaler-gal eliminates half of the attackers. Usually takes 1-2, rarely 3 shots.
It is the equvalent of the power hidden in this spear, IMHO. Lost expeditions, thousands of MIA, legends of supreme Voodoo.