Lumineon

Lumineon is unfortunately another one of those "dex entry" Pokemon that you collect and then move on. Poor stats and movesets prevent it from being valuable in PvE meta. 

Best PvE Offensive Moveset

• Waterfall gets STAB and is Lumineon's best fast move.
• Water Gun also gets STAB, but slightly trails behind in performance.
• Water Pulse isn't a great charge move, but gets STAB and pairs well with Lumineon's fast moves. 
• Blizzard isn't particularly useful for Lumineon's role, but in neutral fights it leaps ahead. 
• Silver Wind has no use. 

Best PvE Defensive Moveset

• Waterfall is much better on defense than Water Gun due to a higher base power. 
• Silver Wind is Lumineon's best charge move for defense, fires frequently as a 3-bar move, and hurts Grass-type counters. 
• Water Pulse gets STAB and is okay as a 2-bar move, but doesn't offer any additional coverage. 
• Blizzard hits hard and is harder to dodge than the others, but being a 1-bar move makes it difficult to use before Lumineon faints. 

Water Gun is technically preferable for its higher energy gains, though Waterfall offers stronger damage output.

Silver Wind is needed for its lesser energy cost, though its damage output is pitiful. Blizzard demands the most energy, but wide coverage (including against its weakness to Grass) and the threat of dealing a KO can be valuable when shields are down. Water Pulse is a poor move due to its relatively high energy cost and poor damage output, but it does cost less energy than Blizzard.