i used this pokemon for a bit and it worked pretty well.
Introducing choice specs arctovish .w.
Arctovish @ Choice Specs
Ability: Water Absorb
Level: 50
EVs: 252 HP / 252 SpA / 4 SpD
Modest Nature
IVs: 0 Atk
- Freeze-Dry
- Hydro Pump
- Ancient Power
- Ice Beam
litteraly 3 of the moves here are fillers, there wouldn't be alot of difference if i only used freeze dry
arctovish can actually live power whip from gyrados uninvested, but with the max hp arcotovish can even live max overgrowth (base power whip) from gyrados, and denies it oppurtunity to ddance (you have to dmax to live the freeze-dry), and since it wont be speed boosted, you can pretty easily revenge kill it.
lapras beats you, yes, but you just so happen to eat volt switches from rotom wash, and lapras repeatedtly switching into arctovish is hard.
after those 3 mons, you hammer everything else bar milotic. you nearly always 2hko thick fat azumarill (and most will prob run sap sipper/huge power, which it usually ohkos). you 2hko primarina, do respectable damage against the RU waters (2 of the better walls to arcto that are water are banned), flat out harass the NU waters, crash through NUBL waters not named kingler, 2hko lanturn, we know what happens to poor quagsire.