This may be off topic, but I'm not convinced that STR does anything at lower levels. For context, when I first discovered I could sharpen both of my weapons for +5 STR and used a +5 STR potion I found on the ground near the bank, AND got Shaman buff, I had legitimately doubled my STR almost instantaneously. I rushed back to the area I had been solo'ing at excited to decimate mobs. And was confused when I was still hitting for the same damage as I was before.
I'm sure this changes at higher levels, but at lower levels there is that part of me that questions whether or not STR, STR buffs, sharpening stones, STR potions etc. even do anything.