[RATE MY TEAM] Need help for trick room mega garchomp

[tudor28]

Hey there i need help to make a my team of mega garchomp better. Here are the current members, all with 0 speed IV:
1)Aromatisse @ Babiri Berry ;
Ability: Aroma Veil
Level: 50
EVs: 248 HP / 8 SpA / 252 SpD
Sassy Nature
IVs: 0 Spe
- Protect
- Heal Pulse
- Trick Room
- Moonblast

2) Garchomp @ Garchompite
Ability: Rough Skin
Level: 50
EVs: 252 HP / 252 Atk / 4 Def
Brave Nature
- Protect
- Rock Slide
- Dragon Claw
- Earthquake

3)Amoonguss @ Rocky Helmet
Ability: Regenerator
Level: 50
EVs: 252 HP / 240 Def / 16 SpD
Relaxed Nature
- Protect
- Spore
- Rage Powder
- Giga Drain

4)Jellicent @ Sitrus Berry
Ability: Cursed Body
EVs: 252 HP / 244 SpA / 12 SpD
Quiet Nature
IVs: 0 Spe
- Trick Room
- Recover
- Scald
- Ice Beam

5)Heatran @ Leftovers
Ability: Flash Fire
EVs: 252 HP / 4 Def / 252 SpA
Quiet Nature
- Protect
- Earth Power
- Heat Wave
- Flash Cannon

6)Scrafty @ Assault Vest
Ability: Intimidate
EVs: 240 HP / 224 Atk / 44 Def
Relaxed Nature
- Fake Out
- Knock Off
- Drain Punch
- Ice Punch

Aromatisse is there to set the trick room successfully, since it can't be taunted and to support and heal the rest of the pokemons. Mega Garchomp can scare off the steel and the poison pokemons and of course to win the games. Timid Mega Gardevoir 252 sp. atk, KO's him 95% of the times, sylveon inflicts arround 80-90% damage, except choise speces sylveon with ko's with 1 hit, and ice hidden power inflicts like 60-80%, and not even ice beam doesn't kill him ( pokemon showdown battles ).
Jellicent is the 2nd trick room setter. Amoongus, Scrafty and Heatran are there to help him set the trick room and then start inflicting damage.

I need suggestions to make this team better.