Note : Charming monsters could be done by the skill oratory .

• Object spell_charm_monsters
• anim_suffix spellcasting
• name charm monsters
• name_pl charm monsters
• face spell_summoner.111

• level 5
• sp 20
• casting_time 10
• path_attuned 1024
• skill summoning
• type 101
• subtype 34
• value 50
• no_drop 1
• invisible 1
• range 1
• range_modifier 3
• maxsp 27
• no_attack 1
• other_arch charm_aura

This summoning spell is probably the most effective way to easily solve dungeons.