tuning problem solution?

When I checked my plugs It looked much the same. It seemed 1 and 6 ran lean and 2 and 5 a bit richer and 3 and 4 looked good. So I guess that means I have my whole system to lean. If you run hotter plugs to combat the issue Would you be following the hottest on 3-4 cooler on 2-5 and coolest on 1-6?