I`d really appreciate if someone explained what "Radius effectiveness" is. My initial guess was that it replaces the vanilla "10-damage-per-square" dropoff for explosives, but then I saw the "Radius reduction" so I guess that guess was wrong.
As a side note, MHO is that Thanatonautian Manus from recent update is waay OP - when used by Psi-capable Agent, it surpasses even the Plasma Destroyer given Psi damage type and general armor ineffectiveness against it, while being much more accessible to use through research. I`d say it needs about an order of magnitude of nerfing, to do 10% damage to health and 100% to morale.
Also, all three anti-ghost weapons would really benefit if manufacturing them *and* their ammo was possible, either directly or after additional research, using Ectoplasm as a material requirement.