0344 Claydol

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. 

Claydol is an odd Pokemon in Great League. Ground/Psychic typing gives Claydol more problems than benefits, being weak to six types and resisting five. A low ATK and high DEF stat distribution makes it a good consideration for Great League, but a slow moveset adds to the difficulty of making Claydol viable. It ultimately loses to many popular meta picks, and is mostly an inferior choice. The May 2019 Sinnoh update gave Claydol a boost with the addition of Earth Power, and the January 2021 GBL Season 6 update added Shadow Ball and Ice Beam options, but these changes don't solve the problem of Claydol's lack of a cheaper Charge Move energy-wise. 

Claydol is an inferior choice when considering a Psychic-type or Ground-type candidate. Its maximum CP of 2229 at level 50 limits its use to Great League. 

Don't bother.