Q:
Question on Wooden Potatoes newest video
A:
All the new maps offer Ascended gear, I believe.
You can use the Wiki (link above) to find information on acquiring Ascended gear.
Good luck.
Ascended weapons are no longer worth getting from the PvP/WvW vendors as you still need to do most of the crafting.
Berry farming is from the 3rd episode of LS3 which is the map above Frostgorge. Essentially you go around to all of the berry nodes as well as doing the hearts too if you wish. The berry nodes are character bound so you just hop onto another character and repeat the process.
The attached image is from user Raboni on Reddit.