parasite cell d

[mimas]

Parasitic Cell Type D upgrades the Stink Frame to Parasite Wear De Rol, and from there to Parasite Wear Nelgal, and from there to Parasite Wear Vajulla. From there it is possible to create Virus Armour Lafuteria, the toughest made armour in the game (though a found Aura Field is generally better).
In short, it's worth the 20 PDs per Parasitic Cell Type D to get the Lafuteria...