Do I get a work permit or visa or apply for positions first?

Hi Andrew! That's a common question. I would say that it depends on your circumstances and the criteria you would meet. If you already have a job lined up then your employer should be able to provide assistance with some aspects of the Work Permit. Expat Arrivals has an overview of getting Visas for Canada and Work Permits for Canada. You seem to have already done a fair bit of research about residency and visas, although immigration matters are often confusing, and you may or may not meet eligibility criteria for specific visa types.

Hopefully someone who has gone through the process before can guide you on which method is better. In the meantime, have you contacted the nearest Canadian embassy? Additionally, as organising visas can be complicated, have you considered the services of a relocation company?

I hope that helps