I carry at least 4 putters...
150 S Magic - I voted for 150 class because I simply use this putter the most... long putts, straight/turnover approaches
175 SSS Magic - this has lately been my goto putter inside 20ft
175 S Magic - this putter is slightly more stable than the 175 SSS... I use it for short straight approaches when I am trying to avoid turning over.
175 SSS Wizard - straight/slight hyzer approaches and windy putting... once upon a time this disc was my goto putter inside 20ft... i can actually practice with this and the SSS magic and not really tell the difference... they are even the same color (chalky blue proto)... sometimes I reach and my bag and putt and not realize that I putted with the wizard instead of the magic...
occasionally a 168 warlock finds it into my bag, but I found that its stability is similar to the 175 S Magic and I don't really like putting with it.