Farming Mastery Points
There’s at least 2 mastery points available on the new map, and you gain another for completing the personal story. Otherwise, I’d look through the achievements for all the green mastery stars and start doing them.
As Rognik said, start by checking your achievements to see which ones will give you HoT mastery points; they will be marked with a green starburst/mastery symbol.
There are a bunch of mastery points available from adventures if you complete them at the silver or gold level. See this thread for some very helpful info on adventures: https://forum-en.gw2archive.eu/forum/game/players/Guide-Adventures-Silver-Gold-and-beyond/first. Otherwise, there are mastery points to be gained via both story and open world achievements, in addition to the open world communes that I assume you already have.
https://wiki.guildwars2.com/wiki/Mastery_point_unlocks
There are plenty ways to earn them, but there’s no way to “farm” MPs as each achevement can only be performed once per account.
Bloodstone Fen + LS3E1 gives a total of 6 points.
You should also complete the HoT story if you haven’t already done so since that has many points as well.
Im probably close to where you are right now and this what i did:
-finished HoT story(not the achievements)
-finished everything on bloodstoon fen and continuosly grinding for exp
-went to dragon stand and searched for a meta squad while getting all achievements
-searched for a guide in gaining mastery points from site, strongbox and diving.
Id probably start doing meta events on verdant brink, auric basin, and tangled depth if i would need more.
Dont like doing adventures.
Defeating Mayatl in VB also gives a MP that’s not listed in the achievement panel