The Orc Boar Chariot has received a significant buff because of this, with the boars and the crew all hitting at S5 along with their D6+1 impact hits. Use these chariots between your big infantry blocks to add a massive punch to your big charges. Keep the chariots an inch or two back from the front of the infantry, to prevent enemies from charging the chariot instead of your footsloggers, since their swiftstriding rule should still have them charge as far as the orcs on foot.
An upgrade very well worth considering is the option for additional orc crew. It's very cheap, even less than an orc on foot, and adds an extra attack to the chariot. That makes 5 S5 attacks plus D6+1 S5 impact hits on the charge. Also consider that the chariot won't squabble, has T5 and 4 wounds, and you've got a game changer if you ever get the combo charge in.
The challenge for when you want to include a third crew is practical in nature, as there simple isn't enough space in the chariot for a third orc, in fact fitting two of them into the space is difficult enough. I'm convinced that's well worth it though, so you'll see my take on it tomorrow.
