Ah OK, I couldn't figure out what the negatives were for, but. from where you are...you are about 3" from the center of the swarm.
If you look at THIS MAP, the yellow circle is six inches in diameter. From you to the other side of the rat swarm is 6". No range penalties.
If you look at THIS MAP, the yellow circle is six inches in diameter. From you to the other side of the rat swarm is 6". No range penalties.




Four day weekend for this girl, YES!!!!