Does anyone know if the Sapphire requires fuel to bestow webmine immunity? Also, can it be towed through the webs and still offer immunity? Thanks in advance.
From in-game experience I can confirm that towing through webs definitely offers immunity. Can't recall if I ever did it with a fuel-less Sapphire though. I would imagine it works fine, as web-immunity is not a mission.
Loki decloak also isn't a mission and nevertheless needs fuel. I don't know by own experience but I doubt that a fuelless Sapphire grants web immunity. This would make the Sapphire immun to combat which would be too strong in my opinion.