[RATE MY TEAM] Help with my new team

[Gentleman]

Hi,

you did an awesome job so far. Arcanine and Garchomp are two of my most favourite Pokemon.
Nevertheless, my suggestion would be to play Garchomp even more defensive.

3) Garchomp
Impish nature, holding rocky helmet
Ability= rough skin
Dragon tail
Earthquake
Stealth rock
Toxin

and for 
2) Vaporeon
Bold nature, holding leftovers
Ability= water absorb
Scald
Roar / Shadow ball
Ice beam
Wish

By doing so 
- attacks and nature fit better to Garchomp's ability and item
- Garchomp as a stealth rock setter makes roar in your team more effective
- together with toxic, dragon tail, wish, protect, synthesis you get a stealth team
- Vaporeon with shadow ball instead of roar to be more offensive and to help Venusaur
with the danger of psychic pokemon

Have a great day!
Best,
Gernot