Just kinda writing what I'm seeing in your build, and tweaking it in my own way. Not exactly balanced, just whipping it up as I go.
Feel free to look at it and build on yours more.
Fencer -> RDM (30 FNC, 15 CNJ, optional 15 THM)
Let's say the Job skills are (using yours) Fire Pulse, Wind Pulse, Holy Pulse, and Dual Cast. We have room for one more, I'm just gonna say Composure: Increases the duration of the next Pulse (half MP normal used per tick for 15 seconds, or whatever the duration is of Battle Voice).
Class skills are another thing. It needs an array of attacks and off GCD skills.
With yours we have 5 attacks: Rapier Thrust (personally I'd rename this one, Swift Blade or something), Dark Thrust, Dark Buster, Flaming Fury, and Armor Break.
Perhaps we could add a DoT attack to the mix for Fencer, since . As Fencer isn't exactly a mage, I'm not sure a spell like Bio, Aero, or Thunder would fit the bill. Maybe Poison Strike or something. DoT lasts 18 seconds, same DoT potency as Phlebotemize.
As for some other skills, just off the top of my head, could have something like:
Tranquil Heart: Reduces enmity gain from skills for 15 seconds (less potent than Quelling Strikes). 3 Minute Recast
Addle: Inflicts Slow upon the target for 30 seconds. 2 minute recast
Gravity: Moderate amount of potency, inflicts Heavy on the target. 30 second recast.
etc. etc. until it has the same amount of skills as other classes.
Traits... Too lazy to come up with some. Might edit later for more stuff. But yeah. Pick it apart if you want.