Help Me with a Cayden Cailean-influenced character

I need advice on how to play this character, well at least how to build it and keep it functioning.

The character is a Gestalt, he is going to be taking the classes Warpriest with Swashbuckler.

Now I know Warpriest is based off Wisdom, but my DM does allow me to use this

Dynamic Priest [General] (Legends of the Twins)

Your self-confidence and force of personality are the foundations of your faith.

Benefit: For the purpose of determining bonus divine spells per day and maximum divine spell level, your primary spellcasting ability is Charisma. If you have more than one divine spellcasting class, the bonus applies to only one of those classes. Your spell save DCs are not affected by this change.

Special: You may only take this feat as a 1st-level character. If you take this feat more than once, it applies to a different divine spellcasting class each time. You may take this feat even if you have no divine spellcasting classes yet.

So this makes everything based off Cha and Dex for damage and to hit.

Now I am willing to change Swashbuckler for perhaps Paladin, but Cavalier's Daring Champion does not give a lot of those nice flavor deeds.

I was going to use a Slashing Grace build, taking the weapon Falcata (Using AEG's Mercenaries book) to give it a total modifier of 18-20/x4 with the free Improved Critical or Keen he can bump that up to 15-20/x4 which seems to be a pretty good range of damage.

So I think my feats are pretty much occupied. We use flaws so my flaws are going.
Flaw 1: Dynamic Priest
Flaw 2: Exotic Weapon Prof: Falcata
Feat 1: Slashing Grace (Weapon Focus from Warpriest allows me to qualify for this.)
Feat 2: Power Attack
Feat 3: Furious Focus

I also thought of a Bard//Warpriest with Dynamic Priest to make the ultimate buffer.

Bard//Swashbuckler plays up the Rapier, but Bard//Pally can do really well in this department as well.

Why not Sacred Fist?

Go Crusader's Flurry, and Fencing Grace.

Interesting I did not know of Crusader's Flurry, it is very useful.

Fencer's Grace requires Weapon Focus, which is another feat.
So that would have to change the feats to
Flaw 1: Dynamic Priest
Flaw 2: Weapon Focus (Rapier)
Feat 1: Fencer's Grace
Feat 2: Crusader's Flurry
Feat 3: Power Attack

I dont mind the push back of some feats, but that also keeps Rapier's dice at 1d6 rather then allowing it to progress to something like 2d8

Unless there is a way to get their deity's Favored weapon to use Unarmed Strike Damage.