Stack fire skill dmg, get obvious legs like reapers, thunderfury, SoJ, Ring of royal grand, cindercoat, pick one of the decent crafted sets like cains, asheara's, aughild's, either use quake set or IK set dependent on what you like the most.
With quake set use lut socks and the Earthen Might passive to instantly get max fury when u do 3 leaps and then either run Hota (Smash) or Whirlwind (Volcanic Eruption) based on w/e you like more as filler between leaps.
With IK set there's 2 choices for Ancients rune either Ancient's Fury (for infinite fury) which you use to let you spam HotA, Seismic Slam, Ancient Spear or Council Rises (for pet damage) which is usually used with Whirlwind as it has a fairly low fury cost so is pretty easy to spam and with the council rises rune Tasker and Theo can be pretty good gloves for mad pet damage.
With quake set use lut socks and the Earthen Might passive to instantly get max fury when u do 3 leaps and then either run Hota (Smash) or Whirlwind (Volcanic Eruption) based on w/e you like more as filler between leaps.
With IK set there's 2 choices for Ancients rune either Ancient's Fury (for infinite fury) which you use to let you spam HotA, Seismic Slam, Ancient Spear or Council Rises (for pet damage) which is usually used with Whirlwind as it has a fairly low fury cost so is pretty easy to spam and with the council rises rune Tasker and Theo can be pretty good gloves for mad pet damage.
Not guides but interesting discussions nonetheless:
http://www.diablofans.com/forums/diablo-iii-class-forums/barbarian-bastions-keep/85843-fire-whirlwind-barb
http://www.diablofans.com/forums/diablo-iii-class-forums/barbarian-bastions-keep/86334-fire-earth-quake-barb-doing-torment-vi-rift-solo
http://www.diablofans.com/forums/diablo-iii-class-forums/barbarian-bastions-keep/86426-any-good-fire-builds-out-there
http://www.diablofans.com/forums/diablo-iii-class-forums/barbarian-bastions-keep/86272-looking-for-optimal-fire-build-gear-build-check