Is cat druid at all viable in classic WoW, what talents do I pick and what gear will be important? Let's take a look.

Talent Tree:
https://classic.wowhead.com/talent-calc/druid/AxwwQATz9_zNASA
Example BiS list: https://docs.google.com/spreadsheets/d/10IV_3NEmZdhh8iQXrs2Ek77YyUJbjBMWO5UxIWLlZl0/htmlview?usp=sharing&sle=true#

http://www.twitch.tv/feral_moose

Resources used from http://barrens.chat (really great forum for classic players)