Is my PU team viable ?

Question

Bouffalant @ Rocky Helmet
Ability: Sap Sipper
Shiny: Yes
EVs: 252 Atk / 252 SpD
Adamant Nature
- Earthquake
- Poison Jab
- Rest
- Cotton Guard

Gastrodon
Ability: Storm Drain
EVs: 252 HP / 252 Def / 4 SpA
Bold Nature
IVs: 0 Atk
- Earth Power
- Toxic
- Block
- Scald

Golurk @ Life Orb
Ability: Iron Fist
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Rock Polish
- Ice Punch
- Fire Punch
- Earthquake

Raichu-Alola @ Focus Sash
Ability: Surge Surfer
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Electric Terrain
- Electro Ball
- Psyshock
- Agility

Pinsir @ Choice Scarf
Ability: Moxie
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Close Combat
- X-Scissor
- Rock Slide
- Knock Off

Absol @ Razor Claw
Ability: Super Luck
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Swords Dance
- Night Slash
- Psycho Cut
- Sucker Punch

Some of my choices are gimmicks like 100% crit Absol(+1 crit from item, +1 crit from ability + 1 crit from the move itself) or Speed boosted electro ball Raichu

Comments

By using night slash, you miss out on knock off. So I think night slash Absol isn't viable.

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Yep, it's viable! And I'm not sure whether this was intentional or not, but your Gastrodon has no item.