Rate my first GEN-7Competetive team and suggest the last team member

Question

I have just created my first competetive team from GEN-7 and I need a help that help me choose my last team member.
My team:
Incineroar@InciniumZ
Jolly nature
Ability:Blaze
EVs:252SPD/252SpATK/4SpDEF
-Flare Blitz
-Darkest Lariat
-Cross Chop
-Fire Blast

Ash-Greninja@WateriumZ
Modest nature
Ability:Battle bond
EVs:252HP/252ATK/4SPD
-Water Shuriken
-Aerial Ace
-Ice Beam
-Night Slash

Vikavolt@ElectriumZ
Hasty nature
Ability:Levitate
EVs:252SPD/252SpDEF/4HP
-Thunderbolt
-X-Scissor
-Flash Cannon
-Energy Ball

Lycanroc(Midday form)@RockiumZ
Modest nature
Ability:Keen Eye
EVs:252ATK/252SpATK/4DEF
-Stone Edge
-Crunch
-Brick Break
-Accelerock

Metagross@PsychiumZ
Timid nature
Ability:Clear body
EVs:252HP/252SPD/4SpDEF
-Meteor Mash
-Zen Headbutt
-Shadow Ball
-Rock Slide
-Sludge Bomb

Here is my doubt Who should I choose Garchomp or Kommo-o

Garchomp@GroundiumZ
Naive nature
Ability:Sand veil
EVs252SpDEF/252ATK/4SPD
-Dragon Claw
-Earthquake
-Stone Edge
-Fire Fang
(OR)
Kommo-o@DragoniumZ
Gentle nature
Aiblity:Bulletproof
EVs:252HP/252SPD/4SpDEF
-Clangling Scales
-Sky Uppercut
-Poison Jab
-Shadow Claw

Help me choose one.Recommend any pokemon if strongerthan these and suggest some other held items as i did not know item better then Z-CRYSTALS.
Also changes in movesets if needed

Comments

You can only use one z-move per battle.

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Wh-wh-Why Are you using timid nature on metagross?

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yeah i know we can use only one Z move per battle but i did not know anyother good item that Z cyrtals.

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Timid nature on metagross bcoz to increase it speed.what other nature works the best on metagross

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Jolly works better than timid. And there are items like leftovers, metagrossite(Metagross only if this is ubers), and life orb. And ditch fire blast on incineroar and shadow ball or sludge bomb on metagross, They do better with moves like thunder punch for incineroar or earthquake for metagross. And if you take Kommo-o I wouldn't recomend an uninvested mixed set. And if using a z-move for Kommo-o use kommonium because that beats dragonium any day of the week. And I'm not even going to try covering every problem.

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This hurts to look at. Your Metagross has 5 moves and is Timid even though it's mixed, defensive EV spread Kommo-o with only attacking moves, Modest Nature on Lycanroc-MIDDAY which has no Special Attacks and only has physical moves, Vikavolt with 4 Special Attack moves but no Special Attack EVs, no Speed EVs in sight either. That Ash-Greninja set is awful, you invested into Attack and gave it a Modest Nature, and the remaining EVs you put into HP and Special Defense. Your Incineroar has Blaze when it can use the much better Intimidate, you gave it Jolly but no Speed EVs, and you gave it Fire Blast when it already has Flare Blitz.



AND LETS NOT FORGET ABOUT THE FACT THAT YOUR WHOLE TEAM HAS Z-MOVES

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if only one z-move can be used per battle, than literally any item is better than z-crystals besides ONE for that ONE allowed z-move