The amount of amber required depends on how many abyssite of destiny you have. With all 3, it's ~30 needed to get items in gold chests, without any it's 70~90 from what I remember. Even if you just get the low amount, it means you get no KIs and useless augs on the aug items (though they all NPC for the same amount ^^) and loads of trash items. More amber = more KIs/better augs but fewer trash items.
My suggestion would be: Atmas of minikin monstrosity; Apocalypse/Alpha+Omega; An MAB one of your choice.
This gives you increased WS damage from Cataclysm, and increased frequency due to occasional triple attack. I'd also suggest using a Magic BP rage to pull hate on avatar.
BP rage an ephemeral or the ramuh mob (if you can find him! I've searched the entire zone before and not managed to find him), then retreat your pet and melee it until you get TP and mob is close to death. If it look slike it will take you a while to melee it down, assault pet again until mob is at lower health. Use cataclysm at ~5% and check your amber. If you have all 3 abyssites, you only need to do 2 of these as you should get 16 from each mob (maybe more if you found ramuh mob).
Once you have enough amber, swap atmas to your preferred DD atmas (so many people forget to swap atmas depending on what you're trying to achieve) then go all out to get pearl up (3/3 abyssite of fortune you should be capped by~150). Now, if you find you haven't seen any feet yet, go back and build a bit more amber. With 3/3 destiny, you will start to get KIs by 90 amber. These are good to have, even if you don't need the mobs, as people will pay a lot of money for a full pop set. Not to mention RR atma drops from Bukhis in this zone if you don't have it yet (staple atma for melee BP rage).