As you said, Absol > Relicanth so -2 Relicanth +2 Absol
Since you are running basics and a stage 1, spiritomb is not needed. Consider bumping up to 4 Smeargle or 4 Sableye for a lead. Get an unown q for sure so you can free retreat that lead and start hitting with absol turn 2. Uxie and Azelf...