Sorry, which Rank 1 set do you mean? Are you referring to the 1 Rank War Spirit set? There's actually no way to upgrade this set, and the regular sets from the Death Valley and Valley of Hell dungeons have better stats are are actually easier to obtain.
I hope this answers your question. If not, please be a little more specific and I'll look up what I can.
Comments
Sorry, which Rank 1 set do you mean? Are you referring to the 1 Rank War Spirit set? There's actually no way to upgrade this set, and the regular sets from the Death Valley and Valley of Hell dungeons have better stats are are actually easier to obtain.
I hope this answers your question. If not, please be a little more specific and I'll look up what I can.