Guild Wars 2

So you have to complete all 4 years to craft the legendary back piece correct? My question is, if I get 10 wins on a Guardian to complete that achievement portion in Year 1 and I keep getting wins on the guardian, will those wins carry over to Year 2 Guardian win requirements when I am onto Year 2? If it doesn’t, then I guess it’s best to only play to required wins for each prof that year, if not I will just get 40-50 wins per class in one hit. Thanks.

They don’t carry over. You need to complete the meta achievement for part one before you can start accumulating wins per class for part two.