Not immediately. You can port the salary account, take the card, and use it extensively, hoping for an LE and card upgrade offer. Or decline the card and get it cancelled and apply again after 6 months.
Regalia generally requires over 1 lakh salary credit a month. And DCB requires 1.75 salary credit a month if you go via salary route. They do relax it at times, but that depends on HDFC.
Amex reward multiplier 1500*4 on the MRCC and 1000*6 on the Gold charge. That would be 1240 MR for MRCC and 1600 MR for Gold charge on spending 12K a month.