Some more calculation for generic online spends.
1. AU Zenith - 1.25% unlimited + 0.5% (2L quarterly milestone)
2. Xcite Ace - 2% on 12.5-20K and 3% on 20-25K spends, Not useful below 12.5K or above 25K monthly spends
3. Xcite Ultra - 2% unlimited + 125 on first 5 days + 0.5% (2.5L annual spends)
Maximum rewards -
1. For 2/4/6/8L annual spends, AU Zenith will give 1.75%.
2. For 25/50/../300K annual spends, Xcite Ace will give 3% reward rate.
3. For 2.5L annual spends, Xcite Ultra will give 2+0.6+0.5 = 3.1% reward rate, but that 0.6 requires at 60K spending in first 5 days of each month. Above 2.5L will be 2% reward rate.
Xcite Ultra is better than AU Zenith for all spend amounts for generic online spends with flat 2% reward rate.
Xcite Ace is best if one has 20-25K monthly spends.
AU Zenith really needs some improvement in generic reward rate. LTF cards are having better reward rate than 8K card😅. One important thing is it's low foreign currency markup and no exclusion for rent/wallet spends.