Short description: optimized game
Long description: totally redid the pathfinding algorithm, as well as adding some cooldown times for certain cases where pathfinding fails, to reduce the total number of pathfinding attempts during any particular frame. Also cleaned up some unnecessary variables that were causing hella garbage collection (c# y'all).
This should fix the issue where lots of NPC vampires active at any given time (which usually means guards, too) causes massive chug.
...
Should fix.