hi! cool team :)
i really really like the cores you've got in this team, a beautiful dragon-fairy-steel core and a fire-water-grass core all in one team, kudos on that my friend n_n
ok! so right now, you lack hazard removal so i think you should choose latios as your last pokemon. it provides you with a really hard-hitting pokemon, a ground immunity, and a hazard-remover, as well as a scald switch-in for slurpuff.
now with your team being overly specially offensive, it struggles to beat specially defensive pokemon like chansey, which is why i suggest changing chandelure [scarf] -> landorus-t [scarf]. you still retain a choice scarf user but you get a ground immunity, part of a voltturn core & momentum-creator, and a blanket check to physical attackers with intimidate.
toxic -> whirlwind on skarmory helps rack up stealth rocks damage, which can be helpful.
i hope i helped :D
good luck friend