Like Matt said stage 2 map job done
I would wait till you have
all the hardware before going stage 2+ thats what its designed for, to take advantage of the
extra hardware, so not having the hardware and having stage 2+ is pretty pointless really, your not gonna gain anything over stage 2.
The standard intake is very restrictive and so is the standard fuel pump that is a fact, so yes in my eyes they are both definatly required for stage 2+.
Intercooler is the one thing you could "get away" with but i would still recommend one really.