Fountains and potions only allow two random attributes. Sometimes, they are not one's primary (or needed) attribute. I recognize this may be intentional but it isn't as fun as it sounds--at least for me. If the goal is to have players buff non-primary stats, having stat-specific foundations might accomplish this in a more fun way. Alternatively, maybe give a higher buff to stats that are further behind (e.g., +2 if 10-13, +1 if 14-20). That would make the boost more meaningful for weaker stats. I hope this is helpful. Great game!