[quote=@BBeast]
<Snipped quote by Antarctic Termite>
A suggestion: our goal with this is to encourage Might spending on useful stuff rather than on power-levelling, yes? What if, instead of spending Might to increase your Level, you Level Up whenever you spend your Level's worth of Might on things other than Holy Sites, Domains and Portfolios? (The exact quantity of spending needed could be rebalanced, of course.)
[/quote]

This can work. Get rid of direct levelling altogether and have it happen indirectly.