Xyston as I love em. Basing em like all my Lart armies so just doing DBA bases then doubling bases per unit. For the Pike elements I am doing 4 on a 15mmx40mm base but putting 3 bases in a column to represent a unit, back one will be removed if it gets in way of a flank or rear attack.
We have found it very rarely happens but you do need to remember a unit is supposed to be on a 40x40 base so we keep one free incase it is needed to show where a unit is.
For HC we stick 4 bases in a 2x2 formation to represent a unit and should have enough pike to add a third rank again to make it look more like a deep pike block.
I do find Macedonian/successor armies have a better win rate than in DBA, or at least my enemies armies have a better win rate at least.