My thoughts as a preferred countries consultant (NOT taxes) - i.e. for the TRUE PT (perpetual traveller) client follow.
I would also focus on the national laws in each case, regarding at what point does the specific country deem residency for tax purposes. As a rule of thumb that is usually 180, 181, 182, or 183 days. AND whether successive years of less than their statutory limit, automatically deems one taxable.
Also we MUST be cognacient of the types of business activities (while in a “pass thru” country) that would cause you to be taxable (withOUT exceeding the limit of stay). Therefore, that would automatically cause you to be deemed taxable.
A true nomad, typically rotates between 2 to 3 countries at minimum during a fiscal year - as such, the level of taxation may NOT be as important, as compared to when is residency and/or domicile deemed to have occurred, and what is that country’s definition of residency or domicile for tax purposes.
These TWO terms are NOT synonymously interpreted, and ARE OFTEN interpreted differently by many countries, from our normal “western” interpretation.
Being a true PT is NO longer relegated to only the wealthy - many with only modest incomes, those who have remote businesses, or pensions CAN & DO participate as PTs.
HINT: as a former manager with Deloitte (MAS division), I can tell you that as a general rule, at least one of the BIG Four audit firms (Arthur, Deloitte, Ernst Young, PWc) has compiled the tax rules for a given country - these publications are FREE of charge and available on the net, and are usually referred to as Country Guides.