Round the World Swiss Air Business Class Ticket - which FF program should I credit my flights to?

Hi there
I have purchased a Swiss Air round the world business class ticket which utilizes Thai Airways, Swiss Air and United Airlines (for Sydney-Bangkok-Zurich-London-Miami-LAX-Sydney). I have joined each of these airlines’ FF programs. I would welcome your advice on which one I should register in my booking to achieve the best points/benefits. I am also a member of Velocity.
Many thanks
Tessacate

I’d say Singapore krisflyer as it’s the only program you can transfer to/from velocity

Depends on if you’re chasing status or the points. For status check out http://www.wheretocredit.com/

For points I’d go for SQ Krisflyer. Also if you get KF status it’s helpful for domestic VA travel for lounge access, etc.