So I'm level 75 and strless. Should I just stay strless and get a 100+ atk Kandiva and load up Dex equips? Or get str equips and a high attack Nisrock/Dragon Shriner Bow?
The second option. You should be fine with a decent Kandiva for a while, but once you get enough funding for a nice Nisrock or Shiner, you should invest money into getting Str equips and pumping in a bit of Str via level up AP.