Sigilyph

Sigilyph is a regional largely based around Egypt, Greece, and some surrounding areas. It has decent stats and a defensive typing which is appealing for a gym defender, but its movesets are quite poor. More often than not, Sigilyph is acquired for the dex entry. 

Best PvE Offensive Moveset

• Air Slash is the strongest fast move on offense, dealing Flying-type damage. 
• Zen Headbutt isn't far behind, but offers Psychic-type damage instead. 
• Psybeam gets STAB and performs the best for attacking.
• Air Cutter isn't particularly strong, but with STAB it pairs for a Flying-type role. 
• Signal Beam is a decent move but doesn't have much use for Sigilyph.
• Ancient Power is poor for offense. 

Best PvE Defensive Moveset

• Air Slash is slightly stronger than Zen Headbutt for defense, but both are similar. 
• Psybeam is the best overall for defense in terms of damage, speed, and accessibility. 
• Ancient Power can be used frequently as a 3-bar move, but is very easy to dodge. 
• Signal Beam can hurt Dark-type attackers.
• Air Cutter is decent as a STAB 2-bar move, but could also be easily resisted. 

Air Slash balances average damage output and energy gains, and in addition gets STAB. Zen Headbutt is very poor for PvP. 

None of Sigilyph's charge moves are strong, but Signal Beam deals a decent amount of damage for its moderate energy cost, and also provides coverage against Dark-types. Ancient Power costs the least amount of energy, but its damage output is very poor. Air Cutter or Psybeam could be chosen for some STAB secondary damage, but their energy costs prevents any meaningful shield pressure.