Thanks. I'm surprised to read merman's are better than Kemas. I still have both my Merman earrings, figured I would use them bringing up other jobs.
The assumption would be that on stuff you're soloing, you are capping accuracy. Therefore Acc from Kemas is not doing anything for you and it's essentially acting as only a STR+2 earring for you. Note that Kemas is still better for WS though due to STR/VIT WS mobs (particularly the beefy ones on Ascetic's Fury).
As for solo earrings, I'd just go Brutal/???. If you have Ethereal, that's quite nice for evasion and attack in one slot. If not, either go DD (Aesir, Merman's, Moonshade) and kill things faster, or toss on an evasion earring or Avenger's.