Uxie

Unlike its sibling Azelf, Uxie was not blessed with a high attack stat. This leaves it with only a marginally higher DPS than Cresselia, with worse TDO. Uxie is the Knowledge Pokémon, and it should give you the knowledge to not use it in raids.

Best PvE Offensive Moveset

• Confusion is the superior fast move on offense.
• Extrasensory falls behind, but not by much. 
• Future Sight benefits from STAB and is Mesprit's highest DPS moveset.
• Thunder lacks STAB and doesn't suit Mesprit's role. 
• Swift lacks STAB and can't be Super Effective vs anything.

Confusion deals much more damage than Extrasensory, more than making up for having slightly less energy gain.

Swift is by far Uxie's cheapest Charged Attack, granting it some shield pressure and damage consistency. Thunder provides coverage, most notably hitting Steel-, Dark-, or Psychic-type opponents that resist Confusion. Future Sight is a great finishing move, but it lacks coverage and has significant energy demands.