New to LS, i was told to do 120-130 dex, then all into strength. How much dex does pretty decent basic fighter gear add?

I've been told and usually go for a pure build.

Either go all into Dexterity or all into Strengh. If you go for a Dex Build use a sword or club for weapon and if you go for a Str Build use a axe.

Hope this helped you a bit

I've heard of this as well, but what is the purpose? Wouldn't axes benefit more from a dex build though, because it adds crit? Because axes are more constant, when you do crit, you'll get high numbers. I mean think about getting a crit while using a sword and only doing 40dmg oppose to 200 with an axe?

I'm just trying to understand the reasoning for this.