Path of Exile 2’s 0.4.0 update hits hard, and if you want to stay ahead of the curve you have to change how you level. The campaign is not just a tutorial any more, it is a race. One thing that catches a lot of players out is the XP penalty. Before level 40, if you drift more than four levels under the zone level, your experience gain gets wrecked. You will feel it straight away. Keep an...