Claydol

Confusion + Scorching Sands or Earth Power and Psychic or Shadow Ball or Ice Beam

Confusion is the preferred fast move. While Extrasensory does have a slight 0.33 EPT (Energy Per Turn) advantage over Confusion, it falls significantly behind in raw damage. 

All of Claydol's Charge Moves are moderately costly in terms of energy, making Claydol rather slow with shield pressure. Earth Power and Psychic benefit from STAB to deal strong damage, though the latter might provide redundant coverage due to Claydol's fast move. Scorching Sands is very competitive with Earth Power, as it has a lower energy cost and a chance to debuff Attack, but slightly lower power as a trade-off. Shadow Ball is a powerful option that is largely unresisted against the meta, but lacks STAB. Ice Beam provides useful coverage, including against Claydol's weakness to Grass Pokemon. Gyro Ball is a poor move and doesn't provide enough damage for its energy cost, nor is its coverage considered valuable in general. Earthquake demands the most amount of energy, discouraging its use. The addition of Rock Tomb following the GBL Season 10 update is unimpressive, as its poor damage output and high energy cost discourages its use despite its new debuff utility.