I am always flip-flopping between two and three molds.
For now my putter of choice is the Dart. It is fast, has enough glide so I do not need to change my stance and technique all the way up to 45 feet, but does not overshoot the basket like how a mid would. It is also stable enough to drive with.
I also use a R-Pro Polecat for approaches up to 100 feet where on a windless day I want to take a run at the basket. Once I get to about 100-125 feet I assess the situation and usually switch up to a mid for approaching duties.
I used to carry the Zone for really overstable duties but I found most of the circumstance where I use a Zone I am better suited powering down a Drone. It is a matter of just one less disc to carry and not really a statement on the Zone.
Sometimes I sneak in a Wizard or Aviar for muscling in approaches or hyzer putting from a straddle position. In the recent past I have also experimented with Pigs, Ions, Soles, Ridges, and Voodoos. Regardless, I always found it must useful to carry two or more putters. That way I can try to play the wind as well as my confidence in a particular putt.