Welcome to AFF
@Grrr - there are a number of considerations here - Velocity are the easiest to accumulate (e.g. credit cards, Flybuys, ...) but buying points in both Krisflyer (KF) and Velocity is never a good option (i.e. too expensive).
Both KF and Velocity require more points for an award than AC but of course it all depends on how you value these points - Velocity also has quite high surcharges. You should do some "what if" searches on each program for some specific itineraries which are of interest to you and compare the points and charges.
Here's my strategy for each program (I use all 3):
- AC - I value AC points at $A0.025 each (as I really only acquire them by purchasing during promos) - I earn some by flying paid fares but not sufficient to make a real difference). You can also buy a percentage of the required points when redeeming an award - which I find very useful - less need to sit on large balances. AC awards to most Asian ports costs 45,000 one-way in J - great value - better than KF and Velocity.
- KF - was my go to program - points gained via transfer from AmEx - but AmEx's devaluation last year (3 AmEx points to 1 KF) kind of put an end to this.
- Velocity - is my third tier program - points gained from Flybuys and transfer from an ANZ Visa card (at 2:1) - has taken years to build up sufficient balance for one trip to Europe in J.
I don't chase status but do like family pooling (e.g. Velocity) - AC had family pooling but suspended new members last year due to fraud - this could change (I guess).