you do not, but you get enough points to level each one appropriately
persuasion isn't something you'll need above 3 points in for most of the game (in my current co-op lone wolf run my friend has 5 persuasion and we're at around the beginning of act 3, but we could likely have gotten by with 2 points in something else like bartering and 3 in persuasion)
i'm not sure if bartering is worth maxing either, i've gotten by without it and still gotten enough money from looting
though in my case i tend to use thievery
the point is that you don't need either of them to be maxed in order to benefit from them for most of the game; between bartering and persuasion i'd prioritize the latter in the end game
Last edited by miaasma; 04/11/17 02:52 AM.