I've had exactly 2 primals drop, neither of which were any use to me. I thought they seemed rather useless but having just read spinrs2k post I see their stats are perfect... just was expecting a bigger main stat increase or something.
There are three types of legendary now, Standard Legendary, Ancient Legendary and Prime Legendary. Ancients are about a 10% drop changes and are a much better version of the standard legendary. Prime Legendary's are ultra rare and the creme de la creme with near perfect rolls on all stats etc, Drop rate is extremely low and in order for them to even have a chance to drop you need to have completed at least a GR70 solo on one character in that season or in the case of non seasonal you just need to do it once on one character to unlock on your account.
Anyone up for some of this later, if I can get on..To be more exact: Primal Ancients are guaranteed to have maximum rolls on every stat, and have a 1% drop rate. Teams of four get four times the rewards from GRs, so if you can steamroll a GR80+ in 5 minutes (as a lot of good teams can) you are swimming in loot and will probably get a Primal every hour or so.
I might buy D3, should I buy D3 and the expansion, or just get D3 first?
They are all pretty cheap so I would get db3, ros exp and necro pack.
you can get primal legendary by reforging a legendary in the cube. If you have the materials it is a quick way to get them and on the item you want.
How do I find it
At this point, it’s pretty much a case of doing adventure mode and pushing to do higher rifts to get keys and greater rifts to get better gear towards your preferred build. Also look to do public bounties for the mats. If you haven’t already take a look at Icy Veins and the Diablo fans forum to find builds for your Monk and gear.