I've not really seen it as an incredibly broken thing so far.. I do occasionally get to watch them charge right at stuff or run into units trying to run away and picking some odd way to do that, but it is usually very managable. I don't really do skirmishing though, unless there are small pockets of enemy reinforcements that I can harass with the very mobile skirmishers and perhaps kill off a unit or two or even the general. Other than that, I use javelinmen and I put them behind my infantry to create a killing zone or I use them to flank. I don't really use slingers and archers only very rarely.