The most difficult event to maximize usage of is this one as it’s hard to be able to target many different units, since it only affects commons. Often, you can discard the first but do try to use the second well. Try to aim for 4 boosts, but in a pinch, don’t be afraid to use it for 2 or even just 1 boost if you really need the boosts for a key attack or a key Vinemancer pull or even to set up an Emerge for your next turn. This event is one of the reasons you want to keep many units around, including Mud Drudgers.