Ok thank you all for the reply's.

Pin and flank...well that's what I mostly do (should have mentioned that from the start). I post this just to know if there was any other tactic. As for horse archers, I might reconsider and use them in my campaign.

The phalanx has been discussed as overpowered, and I don't know enough about the phalanx to refute or support either side of the argument
Neither do I.