I'm having trouble with follower upgrades on a few characters. On my Rogue, my followers are mostly 645 or somewhere between 630-645. At this point, I've had a hard time finding enough weapon upgrades to get those stragglers up. On a few other characters, I keep getting upgrades instead of sets, which I'd really like to use the sets and then the upgrades... especially when it comes to going from 600 to 615.
I got my second Highmaul mission yesterday, and I ended up with a cloak. It wasn't bad, because I had a somewhat weak cloak. So, now I'm at a 630 ilevel and I've never stepped foot into a (Draenor) dungeon or raid -- not too shabby! 😉 Although, I read that you can get better loot if you've killed a certain number of Highmaul bosses. Essentially, if you kill 15 bosses on normal difficulty, you'll get a heroic chest from the mission, and if you kill 15 bosses on heroic, you'll get a mythic chest. Killing 15 bosses on mythic gets you a mythic chest and 1000 gold.