Feat: Tandem Strike

Requirements A creature is in reach of both you and your eidolon.

You and your eidolon each attack, seamlessly targeting the same foe without interfering with each other's movements. Your eidolon makes a melee Strike, and then you make a melee Strike against the same creature. If both Strikes hit, combine their damage for the purpose of resistances and weaknesses. Both attacks count toward your multiple attack penalty, but the penalty doesn't increase until after both attacks have been made.