I earned access to Prismatic Shields last week. On my T9 cargo hauler I replaced a standard 5A shield that was reinforced to level 5 with HI cap experimental and 4 resistance shield boosters with a 5A Prismatic engineered to level 5 reinforced with HI cap and 4 heavy duty shield boosters with super capacitors and it tripled my absolute shield strength with a loss of only 0.5 LY in my jump range. I would say that it was definitely worth the grind to get the Prismatic shields.