You should aim for even tension around each side of the wheel. The instructions with the Park tensiometer say the tension of all the spokes should be within 20% of the average. However dont have the max tension spoke next to the min tension one, tweak the tensions so you get a gradual change of tehsion from the max to the min and still keeping the rim wobble less than 1 mm. If the variation is + / - 20% I think you were starting off with a warped rim - I think with a reasonable rim you can expect to keep the tension even within + / - 5%