My strategy is as follows;
- HSBC VS + HSBC Red (yet to get) combo for rent payment
- PrimeCredit EarnMore for AAVS Octopus 2%
- CCB JD for AliPay to be used almost everywhere 4%
- Citi Cashback for Citi PayAll (moving funds across two accounts and getting rewards) and dining 2%
- ZA Bank for spends upto $30-40 (easily averages to 5-6%)
- any other virtual bank for a specific purpose with better cashback at a given time e.g. WeLab has 10% rebate on dining upto 31st Dec for spend of $5000
- might (a random thought at the moment) get a supplementary HSBC VS card for dining