Heya im gonna give out some great places.
Iron Marches 50-60
There are 2 Friendly NPCS walking this Area which goes invisible to Search for Attackers which comes All the time.
There are also 2 Weapons on the ground which you can use to spawn a Sniper Rifle yes a Sniper Rifle! which you can use to deal 4500+ Damage.
So just run around there killing them and enjoy the Loots!
They drop alot of Greens, Blues & Medium Ritual Bags(Contains all sort of Materials.
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Timerline Falls 50-60
On top of a Hill there are alot of Caulflower (300+ exp each)
This place works great when theres Overflow. Should be about 6-8 Plants which you can gather from.
not only would it give alot of Caulflowers but it would give alot of exp/h aswell ( Depending on Overflow)
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Below the Mountain with Caulflower there are a cave with a Rich Platinum Vein which you can also use when theres Overflow
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Great place 50-60 lots of Materials + 3-4 Events , 1 all the time
Farm the Grawls for bags with the materials.
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Fields of Ruin 30-40
Great place with lots of Platinum , Hard Wood Log , Gathering ! Works perfectly on Overflow
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Big place with alot of Platinum Ore
Thats about it I'll keep posting new things i find!