Just something simple. Instead of making us tap a target 8 time x 8 making us do 64 taps with NPC cluttered maps, assign a gold value for the NPC to and have the goal completed. Something like "Finish current goal (14/15 x 3) for 120 Gold?" Don't make the Gold cost at cost but something a free or lite gold player wont mind spending if they don't want to tap.