How many coins does it take to get good of equips? Quickest way to get coins?

What's the quickest way to get good equips from the tempest shop? Like earrings, pendants, rings, full amour, etc?

Do the Gale Gourd on a Luminous = 4 coins every 30 minutes.
Log in every day = 1 coin per character. It adds up if you claim on every character every day.
3 PQs every day = 3 coins.
3 Monster Parks every day = 3 coins.
200 monster kills a day = 1 coin. Can be done up to 10 times a day and there is a 10 minute wait between completion.
You can also open the boxes that drop but you're not guaranteed to get coins from that.

Quickest would be to just set up a Luminous and do the Gale Gourd while farming boxes from monsters that count towards the 200 kill count quest.

At the moment, the fastest method would be getting 4 coins every half hour while farming boxes for coins on a luminous. fastest possible if you have multiple computers is to simply afk on the computers on a luminous and collect your coins every 30 minutes.