I don't know why you actually bother. I play on the highest difficulty and have invested points pretty munch into everything. It's still really easy to shoot your way through. The only specific build I would need is to play with only melee weapons, as you just die to easily, but there seem to be perks that would mitigate it. Maybe they should at least revise some requirements for guns. A few of them have requirement for body, mostly LMG and a few sniper rifles, but all pistols seem to be without them and those pistols are as good as everything else. The only reason why I would consider rerolling is to change the appearance, but since you don't see yourself in conversations, I don't think it matters either.