For sailing artefacts try out Lekrashan (this can take a long time to get indeed).
Fishing is super easy just try something else than AFK on Velia Shore...
Hunting is easy aswell, just join a whale train and hunt some whales, dunno bout khalk but i guess it will drop them at a good rate aswell.

Trading artefact needs adjustment too. Hunting on land should enable artefacts, not just whale hunts. 

Sailing : Thank you for the tip, I may have a look at Lekrashan, but I doubt probability is way higher there,  at least it will bring some variety in my grinding. I am also ok with a specific spot with increase artefact drop probability, as long as we get the possibility to drop it reliably.   

Hunting : Similar argument here, why binding the hunting artefact to an activity a very smal part of the players does ? Both sea and land hunting should give artefact at a decent rate.

Thanks for the trading confirmation  I will update my original post to add it.

You don't need to active fish, I did like AFK fishing in Grana overnight and then just went to velia for Imperial Fishing Delivery NPC named Karon. There is one NPC in every region. I got 3 artefacts out once and almost everytime atleast 1. Sounds like you turned your fish into cooking boxes and that is why you never got a fishing artefact.

For hunting it is not bound to whales but the drop rate is much higher.

As far as I know the place your turn the fish or its species (linked to fishing place), does'nt matter, only color matter. I always turn in blue and yellow fishs to imperial and rarely the green to trade npc ( when I bother to keep them and don't use the filter ).  The ones, I use for cooking come from sea nodes.  You went lucky with artefact ? I am happy for you, but that does'nt change anything to the argument that the probability is to low because on average you won't turn in 200 fish to imperial a day as you can do with cooking or alchemy boxes. Even if you can catch that amount in one night ( wich I doubt), you still need 200 inventory slots  because, by opposition to the boxes they don't stack. 

Concerning hunting: thus please, increase it on land hunting so we can choose ours hunting spot, while currently we are forced to go whale hunting to get the artefact, or be insanely lucky on land. 

Even some of the gathering ones are a pain to get. I'm a returning player, I mined over 160 000 rough stones and got 8 artifacts related to gathering or lifeskill, none of which were the one I wanted (Sethra's Gathering Mastery x2). 5 days of hardcore energy pot chugging and mashing R key on rocks, and no sign of the one I want yet lol.

Yes it doesn't matter, was just an example.
" Its like triggering processing or cooking artefacts only on apprentice box. " It sounded like you expected to get fishing artefacts from boxes.
The amount of caught fish surely depends on the time spent. But compared to processing & alchemy artefacts they drop much better from my experience.

I don't see the problem you describe with the hunting Artefacts.

For the combat artefacts it is the same, if you want a special one, you have to go to a spot where it can drop.
Or if you want infinity pots you know where you have to go to get them.

That's sound like a distinct problem : not dropping any artefact at all, and dropping the wrong one are two different things.  8 artefacts in 5 days sound good to me, especialy if you compare that to the others profession I mention here, that you can practice regularly for weeks , even months without seeing a single artefact. 

That being said, dropping the 'right' one can indeed be frustrating too. 

I was referring to apprentice cooking boxes and artefact, to try to convince you that restricting the method to get a profession artefact from a specific subpart of the appropriate life skill was a bad design choice, but you clearly missed the reference. Maybe I should have explained it better, I will make a last attempt.

Those are lame comparisons for 2 reasons.  First, the problem doesn't concern a specific or special artefact but all the hunting artefact category, currently bound to a relevant but niche content. Because that's what whale hunting is: a sea group hunting activity and a such a  specific subpart of the hunting lifeskill.  To take an example involving combat artefacts you cite: this is equivalent to make all accuracy artefacts drop 'with a good probability' inside Ataraxion Vahmalkea, while elsewhere they would drop with a tiny probability.

Second, each infinity potion peace has a dedicated spot where you can grind it exclusively: i.e. you don't drop any other potion peace at that place, in opposite to profession artefact that has a (semi-) random type: no way to focus hunting mastery artefact, because you will still drop % experience or all lifeskils ones for instance.

It does. I recently popped a birthday cake buff and did 24hrs of hunting at Narcion. Mostly Shadow Wolves. In that amount of time I got like 8 Hunting XP artifacts and almost as many Hunting mastery ones too. They weren't hard to obtain at all.

It took me 3-4 weeks to get all 4 Fishing artifacts. Seemed reasonable and not at all difficult.

Same thing for the sailing artifacts....I got them from Crocs and it didn't take too too long.

The only part of your post that I agree with is the Trading ones. I don't think they're particularly hard to get...it's just that nobody does imperial trade because it sucks. If they made imperial trade worthwhile then I'm sure I'd have both of them in just a few days.