I think I remember someone posted about attacking with two sword units set at a depth of 1, and hitting a spear unit's corners. If you use 60/100 size infantry units, and the spear unit was at a depth of 4, that would in theory mean 30 men from each sword unit would attack the front, for a total of 60, giving a depth of 2-3 men at the front where they are likely to take casualties. There would also be 4 men attacking each flank, and 52 would pile up around the rear. Can't say I've ever tried it, though, and I expect in practice it would not work out nearly that nicely.

Anyone ever tried it?