Most important IMHO would be two short custom wedges - the lvl 39 ATV are expensive but apparently the best available (soon) in your situation.
Long clubs may be the R11 or future RBZ (what I hear). If in doubt, help yourself with a quality 3WD as an intermediate.
My rule of thumb for a putter: Invest at least 500 crs.
If you accept and can afford a steady flow of credits to WGT, try a custom ball. Start with the least expensive - it helps a lot!