[omega_grunt666]

Especially if you're doing rifts, play on the highest torment where you can kill efficiently and not die. The stacking legendary drop rate bonus multiplied by the 100% from rifts really stacks up.

its easier when you run with people you know and can rely on then some randoms from rift it forward. If you have friends who play try getting everyone together in a rift run and take turns opening, or find a good clan/community. There are people who run class-specific groups to maximize the chances of finding relevant gear, and they'll give you extra set pieces in return for any legendaries you won't use. I would avoid public groups as people even less geared then you feel they should be carried through T3-T6 and it creates a really toxic environment to play in.

Kill speed is important, but a higher torment will gear and level you faster if you can manage it. Always play with a full party if you can help it. Paragon level eventually makes a huge difference, the more gear you have, the less impact finding better gear will have on your character.