What moves will cover more types between these?

Question

Okay, I got a Gengar and I learned it quite the moves (Pun intended), but I just thought of something. I don't have any fairy moves in my team that can cover Dark types.

Gengar @Gengarite
Ability: Levitate
EVs: 252 Speed/ 252 Sp. Atk/ 4 Def
Bold Nature
- Psychic
- Ghost Ball
- Energy Ball
- Sludge Bomb

I wanted to add Dazzling Gleam to get rid of those pesky Dark Types, but I don't know which move to get rid of.
Thanks in advance and good luck!

Answer 1

I would get rid of Psychic.

With Dazzling gleam you already hit Fighting types, and you hit dark types in addition to that. You have nice coverage without Psychic as well.

Just a personal opinion, the other move you could consider getting rid off is Energy ball, but I would rather replace Psychic.

Gengar @ Life Orb
Ability: Levitate
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Shadow Ball
- Sludge Wave
- Dazzling Gleam
- Energy Ball

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Hope I helped.

Answer 2

This moveset covers for the most weaknesses:

Gengar @ Expert Belt
Ability: Levitate
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Dazzling Gleam
- Energy Ball
- Shadow Ball
- Sludge Bomb

So replace Psychic. Poison and Fighting types pose no threat to Gengar.