Most claymore ego users regret making claymores (like myself) because two handed sword is better in damage.
But if you really must have it...
I repaired at Edern and Elen for all my 100 prof stuff o.o
This is what I did
- I had my items blessed
- I only did 1 point repairs
- I had the Lucky "(Insert Gender)" title on
- Before each 1 point repair, I gifted 1g at a time
The steps I took really seems extreme but it worked for me, my friends, and my sister. So give it a try.
[EDIT]
These steps do not guarantee a 100 percent repair rate but it close