Many players make the mistake of playing a main without good ninjas to form a good lineup.
In your case, you have kage gaara so you should be playing wind/earth to maximize your potential until you get new ninjas.
You can consider Wind main with Gaara and mabui as that allows you to launch a 2nd round gaara mystery.
Main can go reset mystery and gaara can mystery again in round 3.
3rd ninja preferably 5 conference temari but you dont have, you can try any combo filler ninja here.
Hope you reconsider as other lightning mains with darui or danzo will beat your lightning lineup 99% of the time.