If you don't want to spend out on a fid/id why not settle for a ice sword/thunder sword. I have a fid a ID and a thunder sword and my Thunder sword is my strongest weapon you can pick one up for 30 or so diamonds a completely underestimated weapon in my opinion.
Just as a side note i think you will all find that the Dagger of Fortune is actually slower then FID/ID remember it works in reverse the lower the number the faster the weapon.