Perhaps names of runes could span from protection to damage.

IE Cold dmg was proposed as being Nica Lorn by Siani, and the Cold protection was Sen Gidla, also by Siani.

One could make it unified like Nica Lorn for dmg and Sen Lorn for prot. or Nica Gidla for dmg and Sen Gidla for prot.

The benefit here is Gidla means cold in both prot and dmg.