The moonlight knight is a build focused on intelligence. Its main weapon is the moonlight greatsword but it can also use other weapons.
Magic moonlight greatsword, magic staff of wisdom, Blue flames, santiers spear.
Chloranthy ring +2, clear bluestone ring +2, southern ritual band +2, third dragon ring
Great heavy soul arrow, homing crystal soul mass, soul spear, crystal soul spear, soul geyser, soul vortex, crystal magic weapon.
This build is deadly in pvp or pve.
In pvp you can use homing crystal soul mass to apply pressure, soul spears to get them rolling or hit, soul geyser for lots of damage and if they get close you can hit them with the mlgs.
In pve id focus more on the hard hitting spells such as soul geyser and soul vortex. These spells hit very hard and can decimate bosses very quick.
If you dont like the mlgs you can use another weapon due to the 20/25 stats. You can power stance blue flames and cast cmw on them. You could also use a santiers spear, chaos blade.
Overall its a build that focuses on its intelligence to wreck anything that gets in your way.