My stick close together strategy was not about forming a phalanx, because when you aren't in a siege (you're out in the open) that phalanx won't really work. What I meant was keep most of the group within a screen or so of the group leader, mainly so you don't get picked off 3v1 as a straggler, and also because it makes it hard to move the group when we get all spread out over 2 or 3 screens.

Siege warfare would have a fairly different strategy than just meeting a group in the field, I would guess. Fighting in tight spaces, rather.