In addition to the jaws point, spears aren't reliably giving you any extra attacks if you honeycomb your models (as you should), unless your models are surrounding a single hero/monster on a different sized base where larger gaps open up in the 2nd rank, because the first 2 ranks are both within 1" measuring base to base, while the 3rd rank, if there is one, is right at the edge of 2" (50-51 mm away with perfect base contact) vs other honeycombed 30mm bases; there's no room for error with the honeycombing if you want the 3rd rank of attacks like there is for the 2nd rank, and vs models with larger or smaller bases, you may not get anything from them at all, depending on how the lines form up.