Need advice on which FF program is best from Star Alliance. Main trips: Business & Economy is London West-Coast (US) (SFO and LAX), some inner Europe but main issue is with upgrades, redemption and sharing miles with partners - which airline allows the best core programme, e.g. United if also flying Lufthansa and Air New Zealand? Or ANZ if also flying United, LH, Swiss, etc?

(1) What is your home airport? LHR
(2) What types of fares do you usually buy? Discounted Economy (personal), Business or Premium Economy (business)
(3) How many miles do you usually fly each year? >50k
(4) Do you have any kind of status at present? What is it? not at present
(5) What is most important to you in a FFP? Credit for travel on other partner airlines, Upgrades on travel, redemption availability.
(6) Which routes do you fly most often (London-Los Angeles/London-SFO, inner-Europe)
(7) Preferred Airlines Air NZ, United, LH
(8) Do you travel for work or pleasure? Both, have some flexibility.