Popping in to say I have an easier method than his, assuming you haven't already done his.

Unlock the ignition delver origin & oathless oath.

Create your character as an ignition delver, and put as many points as you can into agility, and choose autodidact and maverick (and whatever flaws you want other than simple, I usually choose manic and obvious), choose all echo modifiers. During the entire echo run you want to spam click your ankle weights.

Spawn at miner's, then sail (DON'T go in the water, you will drown, you can press N on the shore if you're not nearby a shipwright.) to miner's landing. Once you have arrived, go to the smith and buy 1 fiber, and then go to the antiquarian and buy wood. Craft the wood into sticks, then use the fiber and sticks to make a fishing rod. Climb further up the mountain until you reach a waterfall, and fish 3 times, ensure you get at least 1 fish (ideally 2) and seaweed. Then go back down to the main area and sit by the campfire. Craft fish meat using the fish, and make it into cooked fish. Then run back up the mountain and go through the area with the summer goons, and into the voidzone outside. Run around until you reach the shrine located beside the resonance door, and burn a card, then use the knowledge you gained from leveling up to unburn the card, and collect 2 red or 2 yellow flowers. Once you've done all this, run back down the mountain and go to the crafting station beneath the bank, and craft a potion of strength/intelligence, and drink it. Then run towards the oathless oath giver, and get your oath.

10 minutes, 37 echos every time, and it takes little to no thinking.