(1) What is most important to you in a FFP?
Lounge access, priority security/check-in/boarding, complimentary/discounted or status upgrades, FFM accrual

(2) How many miles do you usually fly each year & in what class? How many flights/sectors?
Usually 3 flights between the USA and Asia, and several flights within Asia (cannot always get alliance airlines on these, but I try) -- typically economy

(3) What types of fares do you usually buy?
Typically discounted economy, or saver economy awards -- will begin booking selectively on business/first class with points and $ as I get more savvy

(4) Can you choose your airlines and/or class of service? Do you travel for work and/or pleasure?
I can choose 100%, I travel for pleasure

(5) Which routes and airlines do you fly most often?
Delta ATL--> SIN

(6) What is your home airport?
ATL, SIN, SFO

(7) Do you have FFP status of any kind in OW or other airline? What is it? Do you have any miles banked in a FFP?
Delta Gold Medallion (115K miles), United Gold (10K miles), plus around 170K Chase Ultimate Rewards points

(8) Preferred Airlines? Most common Airlines flown on?
Delta

More details...

I have never flown oneworld carriers and have no oneworld frequent flyer accounts setup YET. I snagged one of the Qatar deals from BKK to LAX on Business for $1,500~ RT so I have a large earning opportunity coming in March 2017.

Have a dilemma and would love an opinion:

A) Should I credit this long flight/miles to Qatar and status match to Qatar Silver/oneworld Ruby - no lounge access on any economy seats I book with just Ruby At least I can start earning nice miles in a QR bank as I will likely use them in the future since they fly into my home base, ATL.

OR

B) Should I credit to American. Only reason I may do this is because I may do a few credit card sign-on bonuses later in 2017 worth 50-90K AA miles. I have no desire to use AA outside of this in the future, but the bonuses seem nice.

Status matching to AA Gold or Plat after setting up a bank with them seems useless because 1) my Qatar flight wouldn't earn miles for the status challenge (they don't count Qatar EQM's for the 90 day challenge) 2) if I ever fly on American in the future (not my ideal), it would be from award flights, if ever, so it's not like I'll earn EQM's on award flights either.

I have some future flights on oneworld carriers potentially coming as well (Sri Lankan and/or Malaysian), so this is another reason I need a oneworld bank.

Any thoughts? I hope this was fully coherent. I'm leaning towards Qatar.