Pyroar isn't dead, but it defenitely isn't viable as a standalone deck. The only Tier 1 ways I can think of using it is in Gengar-EX decks and Seismitoad-EX decks. Solo Pyroar with a few tech Fire Types can't win because, even though they get a lot of solid matchups, they still have a few here or there where Intimidating Mane becomes useless:
Good Matchups:
Virizion-EX/Genesect-EX
Bronzong/Dialga-EX/Aegislash-EX
Seismitoad-EX (without Garbodor)
Plasma/Aqua/Magma
Night March (without Flareon or Gourgeist)
Yveltal-EX (without Garbodor or M Manectric-EX)
Aromatisse Toolboxes (without M Kangaskhan-EX/M Gardevoir-EX)
Fighting Toolboxes (without Garbodor or Crobat)
Bad Matchups:
Anything with Garbodor, Megas, Stage 1's/2's, or Shredders(cards that aren't affected by other effects i.e. Latias-EX & Rayquaza)