With at least 35 Fishing, you can send your minion out with /kname:Tempoross.
All rewards are dropped as your minion returns, no need to fish the reward pool.
Spirit angler can be acquired with /create, but provides no additional boost over normal anglers.
Important boosts: Crystal harpoon for XP, Infernal Harpoon for rewards. Either needs to be equipped in your skilling gear. Dragon harpoon also works but is a strictly worse version of the Infernal Harpoon.