so i currently have the following :

1x ISD

3x VSD

3x GSD

2x Raider

2x starters worth of ties

1x imperial fighters

so the question is what else do I need?

You have it easily covered for ships but a pack of the Rogues and villains would help your fighters, particularly Dengar.

1 more ISD, 1 more raider, and 1-7 rogues and Villains depending on funds would allow you pretty much the flexibility to run any list you see talked about around here.

1 more ISD, 1 more raider, and 1-7 rogues and Villains depending on funds would allow you pretty much the flexibility to run any list you see talked about around here.

This. Honestly, you don't need anything else. But if you want to completely round out your collection, I would recommend another ISD, one or two Raiders, some Rogues & Villains, and also some more Imperial Fighter Packs so you can run Rhymerballs.

If you want Squads buy a couple packs of them, extra Dice is always good.

You should have 3 isd, 5 vsd, 6 glads, 8 raiders, 17 ties, 11 advanced, 12 inters, 15 bombers and a bucket of rogues and villins and then you will be complete till wave 3 hits the shelf

so the question is what else do I need?

Experience playing the game