Seafarer's Dubloon Farm; best method?

Gameplay Dungeons, Raids and Scenarios
1

Title pretty much says all there is to say. tl;dr is that I’m trying to speed up the process of unlocking my last allied race by farming the Dubloons and spending them on the vendor items that can be turned in for rep. I’ve been queueing up for Heroic Expeditions and just churning through them as fast as possible, but I’m wondering if anyone has advice on farming the Dubloons. I’m not sure if there’s increased rewards for killing more things vs opening chests and mining Azerite or some such.

Any info you can offer is appreciated.

2

110-111 DH twinks with Raddon’s and the Antorus 2-piece obliterate them, but it was quite a while ago that I was doing that.

3

Raddon’s was changed, cooldown on Eye Beam is reduced by 0.3 sec each time it hits an enemy, up to a maximum of 20 sec

4

The fastest way is to get a group of geared people, smash through Mythics by split clearing.