Current Threat list:
Mega Aerodactyl (all variants)
Swords Dance Mega Abomasnow
Mega Swampert
Roar Blastoise + Entei
Mega Sharpedo
All these currently just outright sweep your team if one pokemon happens to be gone (the pokemon that checks them). I honestly dont believe that your team is applicable in the current metagame. I'd say this is due to having both Blissey and Scrafty in your team. Blissey is more oriented for a stall team, not an offensive team. It seems to be a cleric, but remember, not ALL playstyle require a cleric to play well. Here would be the changes I would call more optimal than what you currently have:
Change suicune's set. Suicune is a bulky Tailwind setter, but it really is outclassed by Whimsicott. Whimsicott has an immunity and arguably better resistences, AS WELL AS a move that allows it to switch out, and a godly ability in Prankster, to either ensure TWind, or a nice Stun Spore/Taunt on a predicted Set up sweeper. I'd use Suicune as a set up sweeper/win condition, rather than a tailwind user. Here's 2 sets you can use:
Suicune @ Leftovers
Ability: pressure
EVs: 252 HP / 252 Def/ 4 Spe
Bold Nature
IVs: 0 Atk
- Scald
- Calm Mind
- Rest
- Sleep Talk
OR
Suicune @ Leftovers
Ability: Pressure
EVs: 252 HP / 196 SpA / 60 Spe
IVs: 0 Atk
- Scald
- Ice Beam
- Substitute
- Calm Mind
These sets act as one of the best (if not the best) win condition in the tier. The first set is the most common, and probably better. One sets up and wins any time it is given a free turn of set up, while the other is solid in the endgame, when you've statused some burns around with early game scald and such.
I'd recommend switching Scrafty for another completely different mon. Scrafty is really bad in this metagame, and dies to most of the top tier attack typings, being flying, fighting, and fairy. It is also still absurdly slow, even at +1. I'd suggest using Krookodile in it's place, or even Hydreigon, as both are undeniably much better pokemon who can actually force the opponent to play around them:
Krookodile @ Rocky Helmet
Ability: Intimidate
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Stealth Rock
- Taunt / Pursuit
- Knock Off
- Earthquake
OR
Hydreigon @ Life Orb
Ability: Levitate
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Draco Meteor
- Dark Pulse
- Taunt
- Roost
Both act as a healthy answer to stall, with Hydreigon having much more firepower due to the tier's lack of special walls (that currently dont beat hydreigon), while krookodile is a team member for his ability, effectively slowing volt turn cores, offering SR (huge plus), and Knock Off. If you do go Krookodile, try to replace donphan for another spinner or defogger, most likely Crobat or Forretress (Forretress can set up spikes to make SubCM Suicune's job easier), as well as both of them offering U-Turn and Volt Switch respectively, giving your team a boost for offensive pressure.
If you really want, you could replace chandelure with any mon you'd like, or turn it into a specs set. For the last slot, i'd suggest a better scarfer such as mienshao, who also has u-turn, as well as the ability to check Mega Aerodactyl, and Salamence if you pack HP Ice or Stone Edge.
Additional note: You can always get rid of suicune and make Empoleon your rock and/or Defog mon, meaning that the other slots have more freedom in synergy (as the role of setting up rocks or spinning is limited), or just freeing up moveslots.