As I recall you had mentioned feeling opposite effects from what would otherwise be a heavy or sedating kava, correct me if I am wrong. The headier varieties would be better in that case.
Although I don't really think there is any one kava good for pain alone without some type of sedation, I think the kavas that may produce that feeling tend to be the ones higher in DHK. So maybe look for kavas favoring that profile, maybe kava Supreme which is 245XXX, or Borongoru from KWK; 241XXX.