STD Coilovers
Whiteline rear sway-bar
VF52 turbo with stainless braid oil feed (bolt-on upgrade)
X-force turbo back and Invidia Q300 exhaust
Process West Intake
Process West Top Mount Intercooler
HKS EVCS 3 Port Boost Solenoid
DW Fuel Pump
Cusco catch can
Nice collection of mods there. Right in the "bang for buck" sweet spot. Other "incremental improvement" stuff might make sense "while we're there" if other work is being done later, but for now that seems to be a nice setup.
The only other thing I can think of is perhaps a second catch can. Assuming the first one is on the crank breather circuit, a second catch can can go on the rocker cover breathers circuit. TBA on whether it catches anything there. On petrol my rocker covers catch can caught [very little/nothing], while on E85 it collects plenty of water vapour and some oil.