Build planner
Fishing at level 20
The setup that gathers the most at your level, from everything on the wiki: judged by how long each gather takes, the chance it succeeds and the drops it gives, at the node you pick. Put your own piece in any slot and the planner builds the rest around it; save it to keep it and share it.
Tool
Its power decides which nodes you can fish: 8 reaches everything up to the Warm Pond Fishing Spot
Why: The most Raw Shrimp a minute at the Plains Fishing Spot of the fishing rods within your gear level.
Other pick: Anglerfish Rod (Lv 25: 13.5 efficiency, 8.5 luck; 3% less a minute here)
Armour and accessories
One of each; rings twice
Why: Adds the most here of the chestplates that help Fishing.
Other pick: Fisher's Vest (Lv 20: 22.5% efficiency; 1% less a minute here)
Why: Adds the most here of the gloves that help Fishing.
Other pick: Fishing Gloves (Lv 4: 7.5% efficiency; 1% less a minute here)
Why: The most luck an amulet gives here. Luck is a chance of a second drop on each gather.
Other pick: Subnautic Amulet (Lv 0: 17.5% efficiency, 11.5 luck; 1% less a minute here)
No ring or greaves on the wiki help Fishing.
Pet, elixir and food
Why: +5% Fishing XP. A pet's own bonus counts in full: we don't have data on which pet tier unlocks it.
+5 Fishing Efficiency, added to the flat total. Permanent. Counted at its top level: it isn't in your elixirs yet.
+49.5% Fishing Efficiency and +22.5% Fishing XP for 3 hours. Each star adds 10%.
Guild and collections
Not countedYour guild's upgrades and your collections add efficiency and XP, but the planner can't know yours. Turn them on to count them.
The Plains Fishing Spot: its page, with its drops and where it is.