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Fire/Dragon is all the neutrality you need since only like 4 total Pokemon resist it. I normally run Outrage/Flare Blitz because people are too scared to bring in a steel type on Charizard and Fairies just make Outrage end faster.
With Dragon Dance and Tough claws along with STAB, your last move should really be coverage based on what you can't OHKO right there, unless you can get a non-STAB move to hit 240 damage neutrally. I find Thunderpunch or Brick Break works best since they deal with two of your more common actual threats, Azumarill and Tyranitar, to the point of OHKOs.
Used to be able to get free setups switching in on Mega Mawile, Aegislash and Mega Lucario usually baiting out a CharYzard but that boat's sailed. Fortunately people are still occasionally running stuff like Ferrothorn that doesn't want to stay in, giving you a free dragon dance on switch.
I've never really had much luck with the bulky set.