One of AFK method to increase gathering.
1- Buy empty bottles at material vendor base on you current energy. If you have 100 energies, buy 100 bottles.
2- Go to the river and stand beside the water. Make sure half of your body in the water.
3- Right click the bottle and now you can AFK gathering.
Note: Use Balenos Meal for faster gathering. No sharp/hard gathered using this method.