Diadem Point & Scrip Efficiency

As of patch 6.3 the best fish for Skyward Points and Skybuilders’ Scrips is Sweatfish.

At 3450 gathering, the average point yield per three-hour lockout exceeds both phase 3 and 2 when they were relevant.

Among phase 4 fish on their introduction in 5.4 and the increased yield achievable in 6.1, Sweatfish has always been more consistent but with a lower point ceiling.
Lightning Chasers were 15~25% better.

Currently (and indefinitely), Sweatfish at 3450 gathering is 22~35% increased yield per lockout over Lighting Chasers. Hourly, this is a yield of 15-20k.