The OCBC Titanium Rewards Card is one of the best credit cards to hold in Singapore - especially if you shop for electronics, clothing or simply use mobile payments (like Apple Pay) a lot. I have previously covered the card in detail where I have also compared it to the Citi Rewards Card which is a credit card for similar purposes. There is currently a targeted opportunity to earn up to 6 miles (15 OCBC$) per SGD on the OCBC Titanium Rewards Card. The word through the grapevine is that OCBC will be extending the 10X OCBC$ on Mobile Payments (supposed to end on 30 September 2017) and they have actually included a Lounge Key Benefit in recent months.
[Update 28/9/2017]: 10X OCBC$ on Mobile Payments extended to 31 December 2018
At the point of writing, it is not clear when OCBC will be extending the 10X OCBC$ promotion on mobile payments until but I would imagine it to last until 31 December 2017 at the very least. If like me, you have maxed out your 120,000 bonus OCBC$ on one card, you may apply for the other colour to benefit from another 120,000 bonus OCBC$ cap - the blue and pink cards are considered to be separate cards with their own annual limits to the number of bonus OCBC$.
There are plenty of credit cards in Singapore that gives complimentary lounge access at the airport - some of them are unlimited and even allows you to bring additional guests in at no extra charge! However, in the event you do not have any left or you do not hold any one of those credit cards, you can consider accessing the airport lounges at just US$27 (S$37) per visit. This benefit is currently extended to cardholders of the OCBC Premier World Elite Debit Card and OCBC Titanium Rewards Credit Card. Lounge Key appears to have a fairly healthy selection of lounges to choose from so this is definitely something to consider when you have to deal with a long layover in an airport.