This is what order I did and I recently(2 days ago) got 208.2rwkw at the wheels on 9.6psi.
3 zorst
4 pod with CAI box
1 power fc and tune
2 front mount
5 EBC & tuned. ( I did 2 & 5 together and tuning 2 days ago)
This is with a stock turbo, clutch, AFM, shocks/suspension/etc...
If you decide to go with larger turbo you should strongly consider the other mods aswell.
I will be doing my handling, braking, clutch, AFM and also cams and cam gear before upgrading my turbo.
After this I should reach my goal of 250rwkw
good luck