I know I promised to tell why I wanted these hammers and since there are so few of them around I figured I would just let you know now. Asahina Yajinden was partially correct in that having only one or two mods on the items allowed me to imbue the other properties I really want, but that is only part of the story. The real reason I wanted these hammers is for the rare times that a mixed (non physical) damage type appears on the weapons. The perfect situation would be as follows:
My crafter creates an exceptional weapon made with iron ignots(I have 100 arms Lore which yields a high damage increase property automatically) and the weapon has 100% of a non physical damage type -- for example 100% Energy. In a perfect situation the weapon would just have the 100% Energy and a bonus to max damage increase. This would allow me to add 3 properties of my choice for the perfect pvm combination. One example would be:
Arachnid Slayer
50% Stamina Leech
50% Mana Leech
55% Damage Increase
100% Energy Damage
I use a Dexxer that leeches life, so weapons like this are my bread and butter.
After trial and error, I found that Dull Copper Runics are not as good for this. The perfect runic hammer for this process is the shadow runic. I am still willing to buy as many as anyone is willing to sell. I was reading up on possible updates to the new expansion and that they might be adding damage type as one of the possible properties that could be imbued. If this happens, then I would no longer have a need for the hammers.