King of the Mods. Apparently.
Realistically you need as much done as possible before getting it stage 2 mapped, so a cat back and a dv is basically stage 1.. You need to add a DP, fmic, cone filter as a bare minimum..
I'd recommend doing an N249 bypass, not for any additional power, but because its easy enough to do and does make a bit of a difference, as well as removing some of the hoses that are likely to be perished/perish in the near future.
I am hoping to be a map away from complete stage 2 in the next few weeks, just need to fot the DP I have and the FMIC bits I have. Have a look in my thread