What class can efficiently use Knight stats?
I would advise you to just swap the stats on it to whatever fits your current focus right now. As far as I know, Knight’s armor isn’t really made use of, seeing most, “Meta” builds are running things like, Berserkers/Marauders/Vipers/Dire ect. so you might as well see what you need, and change the weapon’s stats to that.
Hope this helped.
https://www.twitch.tv/amazinphelix
You probably should mention, what the OP likely doesn’t know: You can swap stats with the Anthology of Heroes, it’s pretty cheap. Check this out:
‘would of been’ —> wrong
There is not really a class that uses knight stats specifically. However WvW players do tend to mix toughness and/or vitality in their gear set. Although this is usually a mixture of two or more kind of stats. And not a full set of of a single stat type.
That being said as @ProtoGunner said you can change stat on your ascended gear using the Mystic Forge
You can swap stats with the Anthology of Heroes, it’s pretty cheap. Check this out: https://wiki.guildwars2.com/wiki/Anthology_of_Heroes
In terms of staying up to date with builds and all. You can check out Metabattle.com or qTfy.eu to see what is effective in what scenario. That being said. Unlike most people that just copy paste something. I would recommend you to dive into the class/build and see what it is capable of, and how you can make alternative changes on lets say depending on the encounter/group composition.