If you do indeed spend RM1K and above, you'll need 2 cards to optimize your returns.

First thing to do is go convert your  MBB Gold to Maybankard 2 Cards Platinum where you can get cash back and complimentary golf green fees at 14 selected clubs in Malaysia. Go to MBB site for more details on the golf clubs.

As for Airmiles, I don't think is worth the time if you don't consistently spend RM5K and above.  I keep repeating in all the posts you guys got to decide you want airmiles or cash back only as you can't get both. Some cards allow you to convert your points to Enrich points but I think you'll get better returns when you redeem for cash vouchers.

If you really want airmiles, go look into Citibank PremierMiles, 1st year free, second year I don't know, you got to request. And if you really fly a lot, get MBB World MasterCard where you can earn 5X Airmiles but the card is not free. You have eliminated both these cards when you stated Free Lifetime Annual Fee as a must.

For petrol,  click here to read my article titled The Best Credit Card in Malaysia for Petrol and Movies. YOu can either get UOB or OCBC Titanium MasterCard where you can earn 5% cash back at ALL PEtrol Station. If you pump at BHP, get the UOB One Card. Also check out Petrol thread by clicking here.

So your combination should be of Maybankard 2 Platinum Cards and UOB One Card/OCBC Titanium MasterCard where all three card gives you cash back,  Free Annual Fees with or without conditions. For free green fees MBB 2 Plat and lowest overseas conversion rate with MBB 2 Visa or MasterCard.

If you really into golf, the CIMB WorldMaster card do offer complimentary green fees for clubs in Singapore and Indonesia. Click here to CIMB site)

If you have the time, read my article titled Earn Pocket Money with Credit Cards by clicking here. I have given examples on how to optimize returns with different spending patterns.