Touch and Placement are far more important in doubles than killing the ball – especially with volleys and overheads! Getting too “hungry” often just ends up becoming a wristy or swinging shot that ends up in the net or long.
Get your first serve in! So many other pros I’ve worked with emphasize this over and over again for doubles. As soon as you miss your first serve, your opponents get into “attack” mindset (or should!) on your second serve. Take a little pace off to boost your 1st serve percentage. Or consider using a higher-percentage slice serve (versus flat) as your first serve: it may have less pace, but the ball will be trickier for your opponent to handle. The team with the highest 1st serve percentage in doubles has a big advantage.