Hi,
Don't worry about timing.
You can only get a prov licence once you are in NZ. So you don't need it to submit your EOI or ITA.
You need a spark with a full licence to sign a declaration saying they will supervise you. Dont' panic, no-one is going to stand over your shoulder!
The prov licence is valid for a year, and that gives you 2 attempts at the exams in June or November.
(They're easy).
So if you are granted WTR->PR or PR with section 18a you will have enough time, and NZIS only require that you have registration & prov licence to remove conditions from your permits.
When we did the NZIS bit, a letter from the EWRB (recognising my qualifications & experience) was all they needed to process our application.
But things might have changed.
As Nat said, they've been through the EWRB/NZIS shredder more recently so might be more help on that side.
My EWRB assessment was done in April 05 so info could be out of date, but I'll help as much as poss.
Don't hesitate to ask.
As for work, it is slowing up a bit here in Hawkes Bay, but you shouldn't have a problem getting a job.
Christchurch seems to be busy for sparks at the mo!
Have also sent you a PM.
Nick.