I think Sy has just about got it right. The dyno lottery plays a big part in how much power you get from a car at Stage 2+ with a hybrid and WMI.
I have been in several stage 2+ cars and by far the most ferocious of these has been Statllers DSG Edition 30.
GIAC Extreme map - stage 2+
THS Intercooler
Modified intake
Autotech HPFP
3" straight though exhaust.
Low pressure "in-tank" uprated fuel pump internals
Turbo dynamics hybrid K04
Devil's own WMI
Ran over 430bhp on their own rollers, but that only tells half the story. The power delivery is brutal and continuous. If I was back in a K04 engined car, these are the mods I'd do (maybe a different map though?!?) as for normal driving they are smooth and then for trackwork and dragstrip they are superb too.