IMO don't get too hung up on equalizing spoke tension. It is normal for there to be some variation. A lot of beginners have the misconception that if all the spokes are just brought to exactly equal tension, the wheel will be perfectly built and true. In the real world, this doesn't happen. Aim to get them pretty even, but perfectly round and true. Do watch for outliers that are much tighter than other spokes. In the days before spoke tension meters, spokes were sometimes compared with those on a known well built wheel to assess overall tension. After a while, you just brought them to tension from experience by feel. I have a spoke tension meter now, and I love being able to measure, but it isn't strictly necessary.