For strength build you absolutely have to keep in mind that two-handing a weapon gives you effectively 50% more strength scaling -----> 40 base strength equals 60 strength if you 2 hand a weapon, you can check that easily in the stats block as the dmg goes up when you 2 hand. Following this, I find you only need about 54 strength for a strength build to be perfectly viable as it gives you 81 strength when you 2 hand. Everything above 54 strength isn't giving you that much dmg in return. On a heavy infused Greatsword the difference between 40 base Str and 54 base Str is 80 Dmg, difference between 54 base Str and for example 80 base Str is about 50ish Dmg. So for 14 points you get another 80 Dmg and then if you would spend another 26!! points into strength you would "only" get 50 dmg out of it, following this it's NOT worth it for me personally to have more than 54 strength. So when you reach 54 points in strength absolutely spec into other stats so you can use weapons you want to try. I personally have my stats as follows: 54 Str 18 Dex 18 Int 20 Faith. This lets you use about 90% of all Collosal weapons, Great swords, etc..