Is this a good enough competitive team for this year's online competition?

Here's my team:
1.Whimsicott(Female) Jolly Nature Prankster Ability
Helping Hand
Beat Up
Charm
Tailwind
Item: Focus Sash
2.Terrakion Jolly Nature Justified Ability
Earthquake
Safeguard
Rock Slide
Sacred Sword
Item: BrightPowder
3.Sigilyph(Male) Bold Nature Wonder Skin Ability
Psycho Shift
Stored Power
Roost
Cosmic Power
Item: Flame Orb
4.Garchomp(Female) Jolly Nature Sand Veil Ability
Earthquake
Substitute
Sandstorm
Outrage
Item: Haban Berry
5.Excadrill(Male) Adamant Nature Sand Rush Ability
Swords Dance
Rock Slide
Earthquake
Shadow Claw
Item: Air Balloon
6. Metagross Adamant Nature Clear Body Ability
Zen Headbutt
Earthquake
Agility
Meteor Mash