s23 ultra users suggestion

Charger - any GaN charger above 45 watt. Or Samsung 45 watt charger. 

Case - spigen armour case 

Buy an Samsung made compatible charger only to save battery longevity.

Any case is fine just make sure that its not hard to transmit drop momentum to phone.

the issue is samsung provides a 25w capable usb cable in the box, so you will have to purchase both 45w charger plus cable otherwise it will charge at slow speed with the default usb cable

25W Vs 45W Samaung chargers do not make huge difference in charging S23 Ultra.

It is hardly few mins for 0 to 100% charge. For initial fast charge till 50% also difference is not big.

Hence go with 25W Samsung charger which is available on Samsung Corporate site for ₹ 962