should be able to convert with Affin card, if the amount is > RM 2,000
need to apply though

the previous campaign indicated that it should not be a problem as long as it does not exceed 80% of your available credit limit
currently i have 3 EIP & 1 BT

in terms of cashback for MBB, PBB, CIMB
i would go for MBB, since ewallet would be covered by your Affin Duo/RHB Shell
those 2 cards would have covered up to RM 3,500 monthly spending for maximum cash back, which also covers quite a number of categories
if you prefer getting SST rebate, go for PBB
CIMB, i'll leave it for other to comment, nothing caught my attention

i thought you did some research before and narrow down to 3 options based on your high spending in grocery
so i assumed u were referring to ikhwan mastercard which matches your grocery and petrol spending

edit:
sorry, i mixed up
depending on your spending since affin duo and rhb shell provides cashback on ewallet, which could almost cover most categories

if u r fine with 12-month tenure,
could potentially utilise the Affin 0% 12-m FPP manually but ensure sufficient time between buying/posting date and statement date
alternatively, utilise your RHB shell cash back quota and Affin 0% 12-m balance transfer
either way, might need to wait for a while because the current promotion last until 30 June 2025, hopefully they will be extended

if both cash back from affin duo & rhb shell had been maxed out, MBI Amex could provide additional RM 50 cash back