Team critique thread? I'll start

This is a team in looking to start breeding for today. I still need a special attacker and I am currently undecided on Gogoat or Trevenant

Talonflame @ Flying Gem
Ability: Gale Wings
EVs: 176 Spd / 252 Atk / 80 HP
Adamant Nature
- Acrobatics
- Flare Blitz
- Roost
- Swords Dance

Trevenant @ Sitrus Berry
Ability: Harvest
EVs: 120 Def / 252 HP / 136 Spd
Impish Nature
- Leech Seed
- Protect
- Shadow Claw
- Will-O-Wisp

Gogoat @ Leftovers
Ability: Sap Sipper
EVs: 252 SDef / 252 HP / 4 Def
Careful Nature
- Horn Leech
- Milk Drink
- Bulk Up
- Rock Slide

Tentacruel @ Black Sludge
Ability: Clear Body
EVs: 240 Def / 252 HP / 16 Spd
Bold Nature
- Rapid Spin
- Knock Off
- Scald
- Toxic Spikes

Galvantula @ Choice Scarf
Ability: Compound Eyes
EVs: 252 Spd / 8 SAtk / 248 HP
Timid Nature
- Sticky Web
- Toxic
- Gastro Acid
- Bug Buzz

Aggron @ Aggronite
Ability: Sturdy
EVs: 252 SDef / 252 HP / 4 Def
Careful Nature
- Iron Head
- Earthquake
- Thunder Wave
- Curse