I'm a Tank currently CP 460 and I breeze through normal dungeons and wondering what the recommended minimum CP is for Veteran Dungeons with the new CP system in place.
official? still 300 CP
unofficial? 160 CP in my books (but that varies from player to player)
if you know what you are doing with your tank and if you have a general idea on how to spend your CPs, with 2 decent sets and buff food you should be able to tank every vet Dungeon.
But this is hard to say in general, if you feel confident in your tankingskills, go on, give it a try. If you feel like you are a little wanky on your tankingfeet, go and search for the tank club website or any of the content creators from the community. it will give you insight.