I'm sure there are those that don't run the pair and have good steering but I run both as I like to keep the angles from beeing so steep. Steeper angeles mean the steering will be more sensitive to input.
I rebuilt my steering last year new everything (tie rods, ball joints, C bushings 7 degree, replaced all bushings everywhere, new Delphi box, adjustable track bar, adustable drag link) along with plating the frame both sides, new 1/4 DOM inserts and new it drives like a dream at all speeds....OK, 75 is the highest I've been up to. yea it cost me a few bucks more than I wnated it to but the result was well worth it.
What problems are you having? I chased my steering for years....Told myself I was going to give it one more go and if it wasn't better, I was selling the rig.......That's why i left nothing to chance.
Tim