Taint2 is right Niceguy was spamming Qilin because he drops pouches like candy and people were selling to him for 200k a plate because it was easy money. He's basically lived in Sky for the last week doing Qilin with PUG after PUG to get it done.

Byrth:

Time required to farm:
Relic: At 100 currency per hour with some added time for attestation/fragment, Relics take about a week of playtime to complete. This is mostly done duo, so it's about 2 weeks playtime (~340 mahours unless you dualbox).

Empyrean: I've heard estimates as low as 3 Heavy Metal plates average per Tier 3/4 Jeuno path NM with capped lights and a full alliance. Assuming each fight takes 30 minutes (including gather time/etc), you're looking at 4,500 manhours (27 weeks playtime) to complete one Empyrean from 90 to 95. Even if you average 5 per Voidwatch NM, you're looking at 2,700 manhours (16 weeks playtime).

Mythic: If you average 70 Alexandrite per 90-minute run (which is high on the Alex and low on the time) with three people, you'd expect the Alexandrite stage of a Mythic to take about 2,000 manhours (11.5 weeks playtime).
This math is horrendous as its only counting time spent, as well as a very very low average for Coins in Dynamis. I'll lend that they didnt know how easy plates were acquired from Qilin and how short the fights are.

Dynamis with 2-3 people is an average of 300 coins a run on the low end. At around 18000 coins on the worst end thats 60 runs 2 months of work on the low end for a relic.

Salvage is about 50-70 so we can say 60 alex on average a run on a normal run so thats 500 runs on average to farm up the alexandrite for salvage or 1 year 135 days.

More realistic numbers for heavy metal plates is as I was seeing was 20-30 every 12 runs (with a max of 30 mins a run with no game day wait limitation) I did 12 runs in about 3hrs with Niceguy's group (and thats with replacing people between every 3 runs). So giving the average of 25 plates every 3hrs and assuming (to keep the time put per day on par with salvage or dyna yes its a little more since I'm sure if most of us who do dyna/salvage would love extra time everyday to farm in our specific events) you only do one run a day thats 60 days of work for a 95 empy.

So the current pricetag of 450mil-600mil or a 500 day farm for alex says hi. It's really sad to see so much QQ'ing for these weapons when empys even the base are so much more ridiculously easy than mythics or relics. But comparing relics or empys to mythics right now is insulting and shows that you've not honestly looked into making an mythic compared to making an empy or relic. If you dont think relics are easy you havent been doing new dyna or read the threads on how to do it.