That is the usual problem I run into as well with my line of thinking. It's disappointing that we don't even get Riding Dogs as an option for Halflings because they have not step up to provide statement on mount options.
Could focus on Intimidate and Athletics to control enemies. Seems kind of interesting in it's own odd way. Since you have no way of attacking. You would be able to still damage enemies, if you can get a critical on a trip.