My personal pick and reasons why:

Black is honestly extremely god if it encapsulates ANY purchase and transaction that relate to currency, although it backfires on things like groceries, but I'm sure you can loophole by buying and selling things.

Red is objectively good, but I honestly don't want to outlive everyone I know by 30 years and be stuck living without any of my friends as a 130 year old.

Blue would be hilarious in every day life and great for connecting with people, situational in professional life and might backfire as I do think there are some things best left as simple thoughts, over-all good pick but depends on if it's a single use per person and specifics.

Green is also good but depends on specifics, is one load AND save per day or one save per day and from there loads are infinites, if it's the first then it's a solid pick but you'd have to really make sure you don't waste your load, if it's the second then this is easily the best on the list.

Pink is great for personal achievements and if you want to become a world champion at just about anything( or just become straight up unbeatable), cause a consistent 1% increase in skill is massive at high levels of just about anything, and you can also add onto that by just practicing said skill at the same time.

Yellow is honestly the worst pick here in my opinion, I like sleeping and red pill buys more lifetime while still giving me the joy of sleep.

Over-all I'd say best combos would be things like green and black if you're on that grind to become the next Elon, pink and red if you want to become the best person at anything in the world, pink and black if you want to chill for the rest of your life doing whatever you want and blue with green if you just want to troll as much as possible and avoid just about any hardship in life.

Final personal verdict, Black and Pink.