Then again it's not unreasonable for the most powerfull wizards to cost gems.. they'd need some magical investments to buy all their stuff and components and of course their patron needs to pay that, and they'd only work in a somewhat magically advanced place, wizards have their pride too so SOME research limit needs to be there. I'd say the most powerfull wizards might only come to lands where there was at least research level 6 in the paths they use most

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You'd just need to have some acceptable level of recruitable mages and since you insist on having all paths inboth nations (a topic on which I'm completely neutral there is a lot to be said for both options (more diversity between the nations and smaller recruitmentlines vs lore)) that would mean a line of 9 mages

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