Coils are a possibility, as are plugs and the AFM. It could also have an issue with the Crank Angle Sensor or be a combination of many things. Bad idle can be caused by the AAC valve and the restriction in boost is the default behaviour in 33's, not sure about 34's. In a 33 you can bypass the dual stage solenoid (this is a factory part, not sure of the one you were talking about is factory or aftermarket). While sorting issues remove the r32 actuator, it's another variable.
Do you have a mate with a 34? If so try his coils and if there's no change try his AFM as well. Also check your plugs for obvious issues.
Start somewhere and start taking notes, let us know how you go.
Trust us when we say it wont be anywhere near as serious as you might think it is.