My suggestion (assuming you aren't wanting to spend a lot of money) would be to focus GW tokens on Phasma until she's 7*. At the same time spend arena tokens on sid and all of your cantina energy grinding GS to 7*. As you get Cantina tokens, buy Poe shards and slowly level him to 7*. Fill the other two slots with your two highest damage toons. Once you have Poe 7*, switch cantina tokens over to QGJ until 7*.
Additionally, I would go ahead and do all of the daily hard missions for Rey and FOTP shards once they are unlocked (it's a long grind).
That would allow you in reasonable time to have high level Phasma, Poe, Sid and GS which would be the basis of a very good team, that could soon after be fleshed out with QGJ