Blue Streak Crew

Hey! Wife and I just got into the Ram Fam with a 2015 Crew 4x4 blue streak 1500 5.7 8 speed. Loving it after 4 days already! Just got front windows tinted 20% and a Borla XS into 2 and a half inch pipe finished off with rolled lip 12 inch (I think...) chrome tips. I will look into how to post and put before and after videos. Looking for best CAI and if a tuner is necessary on these. Former Titan junkie... Getting new 22" wheels and mud tires. Any direction on 4" lift is appreciated. Want to upgrade lights for better and whiter output. Looking for flush fit hard bed cover that will work with bed rails.Want any input on better MPG aside from the obvious "Light foot"... Have not seen any reasonable tuner for the 15s... Thanks for taking time to read all this and for your help!