Hi

I have some CX flights coming up and dont want to lose the miles
Mostly fly Skyteam Korean air or Star Singapore air

Thinking to bank the miles in an OW airline but not sure which
1. Alaska
- Able to extend in 24 months with minimal spend like on a mall or something
- Good miles deposit for CX flights
- Hard to get good redemption nowadays...no more cheap JL flights

2. Cathay
- Able to extend in 18 months with online mall spending?
- Able to redeem CX flights easily
- Website is weird...keeps showing flights available but unable to find flights when clicked on it
- Is flight redemption easily available for non CX flights?
- Redemption miles seems to be quite high

3. American Airlines
- Able to extend miles easily?
- Seems to have tons of flight availability for redemption, even has JL F
- Website works well
- Redemption miles seems ok

What do you think?
I used to have Alaska for the JL redemption but that seems to be really expensive now and lack of availability
Cathay website seems wonky and redemption miles is high
AA seems quite decent but im not in usa so will that matter?

Thank you!

Questions
For members asking for information, to help people to assist you, can you please provide:
(1) What is most important to you in a FFP?
Redemption availability for Biz/First
No fixed expiration, doubt I will collect enough to redeem in 3 years

(2) How many miles do you usually fly each year & in what class? How many flights/sectors?
< 25k

(3) What types of fares do you usually buy?
Business or Premium economy
:
(4) Can you choose your airlines and/or class of service? Do you travel for work and/or pleasure?
For pleasure mostly

(5) Which routes and airlines do you fly most often?
Asia regional
Asia to Europe

(6) What is your home airport?
ICN

(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?
None in OW but have some miles in Skyteam and Star

(8) Preferred Airlines? Most common Airlines flown on?
KE and SQ mostly