Was it a mistake to power up my 100% banette?
Well gengar is better so was it a mistake?
Answers
The issue is that it's too slow and the increase in survivability is not a big enough difference.
Sure it's a bit more bulkier but not by a significant amount - Banette is still a glass cannon, so you'd be looking at a similar total damage dealt due to the lower attack offsetting the increased survivability, and lower DPS which isn't what you want in raids.
Look at Alakazam (and Mewtwo) simulations with double psychic moves where Banette supposedly has an advantage or is at least on par with a Hex / Shadow Ball Gengar:
Alakazam with Confusion / Future Sight:
Gengar with Hex / Shadow Ball - 187.3s, 16 deaths
Banette with Shadow Claw / Shadow Ball - 193.8s, 14 deaths
Alakazam with Psycho Cut / Future Sight
Gengar with Hex / Shadow Ball - 187.4s, 10 deaths
Banette with Shadow Claw / Shadow Ball - 195.6s, 11 deaths
Not significantly higher in survivability but still slower clear times. It's filling the same niche as Gengar but does a worse job of it.
Not sure what you're doing differently because I've checked every moveset and Gengar is faster for all of them.
https://www.pokebattler.com/raids/defenders/ALAKAZAM/cp/22646/attackers/attackerLevels/30/strategies/CINEMATIC_ATTACK_WHEN_POSSIBLE/DEFENSE_RANDOM_MC?sort=TIME&dodgeStrategy=DODGE_REACTION_TIME2
This is the page I'm on.
