Suggest which is the best card to get? And should I change my salary account?

Hey guys, I am currently a holder of HDFC DCB plastic LTF from college, and the swiggy hdfc card, and Amazon pay ICICI card. Apart from this, I have a wealth account in ICICI as my salary account. My in-hand salary is at 2.64 lakh. And I have 2 parents and wife.

My current issue is that whenever I plan my travels, I do reach the daily 2.5k limit on my DCB when booking hotel and flights from Smartbuy. So what should I do?

1. Which is the next best card to get after Diners for travel and hotel?
2. Where should I move my salary account to get this relationship going to get a good card?
3. Is there any other card I should get to have better savings?
4. If possible, can I get a card with good lounge access and some rewards for my wife? She is earning around 1.8 Lakh and does not hold any card other than Amazon Pay ICICI.

My monthly expenses come to around 1 lakh, and I do savings apart from this. Tell me the best possible next action?