I know that old spots for pieces are better. That Im sure.

Man i use it on grind i know they donest work on hunting looool.

Narcion is for hunting, Narvan Steppe feather wolves are for grind. WTH?:D

When you kill a mob the loot scroll effect is applied.  When you use a Tanning Knife, butcher Knife, or Fluid Collector the loot scroll is not used.  

There are other items that effect Gathering Drops, Gold Life Alchemy Stones, Life Spirit Stones, Some foods, Elixir of Labor, and Elixir of Rough Labor.  There may be more but Gathering Drop Rate is different than regular ecology drop rate.  It would be helpful to know what potion piece you are going for.  The Narc piece from Featherwolves in Nevarn Steppe only drop from the Phynl, not all Featherwolves.  The Gathering pieces from Nevarn steppe (voltara clairvoiance) come from gathering the Ferrica, ferrina, and Elephants

Well during the last 50% +33% drop rate even I actually got less stuff than without that. Not saying it's rigged, but who knows. It entierly possible that not every drop rate increase stack, we don't see it anywhere displayed and I don't saw anyone testing it either.

Also players by default grind on up to 256.5% drop rate, which means that adding 50% on top will only results ~20% more drop on that said item on avarage, so it's not a very large difference.

Hunting mastery 100% has an effect on the drop rate and amount of pity pieces.  With the hedgehog and 1800+ mastery you can get up to 5 in one kill.  Do you just make stuff up?

Oh I was just joking around because my luck is horrendous with item drops. I don't think I will ever get compass, map or infinite potions. I would be lucky to even get an artifact once a week. My friend however keeps getting like 2 artifacts everytime she goes out gathering or grinding for an hour. Seriously some people....

I wish there was a pitty system. I say this because perfect RNG does not exist. Even true random number generators are predictable. Characters/people have different luck both in game and in real life. That's just how it is and it can be mathematically calculated as much as we know how to do in this point in time which isn't much but we understand that it is at least possible thanks to quantum mechanics.

Anyway... on paper it may seem sound that after 80k kills you're likely to get what you want but in reality, that may be the case for 60% of the people but the rest -- not so much. So what do you do then? NORMALLY in other MMORPGs, they would have a pitty system. This pitty system is a reward that you get whenever you kill mobs or bosses in relation to what you want to get or a means to exchange duplicates if you have to collect more than 1 piece type. This pitty system is what motivates people to keep trying.

There are so many game design choices in this game that doesn't follow common design strategies and it boggles my mind on why they decide to purposely do it the way they do. Is it their ignorance? Is it done on purpose for some mysterious reason? I don't know. But we need a pitty system badly.

The whole treasure system suck.

1. Not all treasures have mini parts so you may never get them vide one of the forum users who has not obtained 1 part of the compass for 2 years, but already has 12 pieces of the second part. It's absurdal and palynf for nothing.

2. Mini treasure part ratio drop it's horrid. Basically it will take you 100-150 hours to get 100. And then next 100-150 hours for next part.

3. Rigid attachment of the drop to specific zones and even specific mobs. This is sick. Every hour spent on dropping these parts is a wasted hour because we do not earn (very little worthy trash)! Also we kill 9 out of 10 mobs for nothing because they don't drop these parts.

And that is why the conclusion is simple: I am still not interested in these treasures if there are no changes: mini treasure parts drop from any mobs from any zone and only one mini treasure type redeemable for any part of the treasure. Only then will it make sense. 

How should I know about it, since I have never received this mini treasue part despite several dozen hours and over 900 hunting mastery?

Hedgehog?  Hedgehog loot it's a bonus loot and nothing affects him! NOTHING!

Eg. you have 16 meat from mastery and rng but hedgehog loot always give you only base amount eg. 1-4 meat.

Gathering from hunting simple give you more because hunting mastery significantly increases loot multiplier and it adds up with the bonus from gathering mastery:

And this chance really works. Over 100% always doubles the loot. One loot  but two stuffed head, one loot but two breath of narcion, etc. It's fantastic.

But how 5? 2 normal loot (as double) + 1 from hedgehog = max 3.

Also, 1800 mastery? How many people have 1800 mastery? 1, 2, 5? for 50,000 players. I know one in Europe and he has already spent over EUR 20,000 in BDO (he was showing the bills).

No idea how much the OP spent, but the OP said he was hunting with 1800 mastery.  Personally I have 1362 to 1502 depending on which character I am using for hunting.  

As for how, there are 4 magic numbers in hunting.  450, 900, 1350, and 1800.  0-450 you can only get 2, one from drop and one from hedgehog. 451-900 you can get 3 1-2 from drop and one from hedgehog.  901-1350 you can get 1-4 1-3 from the normal drop and 1 from the hedgehog.  1351-1800 you get 2-4 2-3 from the normal drop and 1 from the hedgehog.  1801+ you can get 3-5 3-4 from the normal drop and 1 from the hedgehog.