I'm not really a piker or long spear'er...that being said, they should only be 2 slots, and you should be able to overhead swing with them.
The pike/long spear nerf of a month or two ago has really caused a spike in the amount of people on horseback. And you've probably all heard calls to "nerf cavalry" instead of addressing the real problem, the pike/long spear nerfs that caused the spike in cavalry.