Gear for MM after 395

So I have 71 primal chaos and 5 sparks of ingenuity. But I don’t get what to do with this stuff, or fully understand work orders, tips etc. I’m just a casual gamer, so I’m not doing anything difficult. I noticed Heroic dungeons in the dungeon finder. Should I be doing those instead of making gear right now? Thanks.

If you don’t have a good bow I would save some up the Primal Chaos and a Primal Infusion (which you get from killing Rasz on LFR or getting to 30 for Valdrakken accord. This will get you a 405 bow.