You should try this dictionary for things on the internet instead.

It stands for Programmed random occurance, how often the code allows a random effect or ability to happen/work. Flists is saying that the special flourishes' effects don't apply enough and are therefore less useful.

Urban dictionary is not as accurate as most dictionaries. And I've never heard anyone say "proc" before, in any other game, ever.

"Absence of evidence is not evidence of absence."

Simply, you've just never happened to play with anyone who would have said such at the time. It's a pretty staple community term in most MMO[/RPGs] that feature such.

I'm sorry if you don't like my word choice Batabii =3

DBB is also a good piercing bomb. There's no status inflictions so it doesn't have damage taken away from its base. Effectively it's a Piercing version of the blast bomb.

Although I still think if you had only one slot left, try to get a sword. There will probably come a time when you are cornered by twenty Mechs and you just can't charge up a bomb fast enough.

"Instead of choosing a flourish, why not put that aside and settle for a Leviathan Blade? It's an ALL purpose weapon."

I strongly advise you to get a Final Flourish or Barbarous Thorn Blade, over a Leviathan Blade. A set of two or more specialized weapons is superior to a set of general-purpose weapons.

You are gunslinger? How about a Callahan? It takes down Fiends and Beasts very quickly. The knockdown allows you to stun lock them. Knockdown is also great for the nearby swordmaster to get an easy hit in while the enemy is on its back. It can cause dodging, so be very aware of where you are shooting at in a party setting. Personally, I welcome a Callahan gunner in Fiend and Wolver strata, a good gunner is a wonderful asset to the team. It is much better than an AP for those enemies.

As a gunslinger you probably already have ASI and Damage bonuses in your Armors and Trinkets, so a Callahan would play well to your existing strengths.

As weird as it sounds, Levi is a viable choice here. A typical loadout for a bomber, for example, is a Levi + 3 bombs. The Levi is just there as a backup sidearm when your weapon type of choice won't do. And the Levi combos perfectly with your Shivermist. Drop a Shiver then charge up a Levi for 1000+ damage in T3. (A favorite of mine for FSC.)

That said, Flourish obliterates Wolvers and Fiends. So if you really only want a sword specifically for them, then that'll work.

Well, there were 3 occasions in LD where the BTB charge came in handy. First, I was a noob, and decided to charge my BTB. Then, there comes along your average tier 3 player: Vog Cub, and DA. He was charging his weapon as well. We went face to face quickly, (he had his back against the focefield of his team), and we released the charges. Since DA charge was so slow, I was able o kill him with BTB charge, which happened because he had no piercing defense. (Shows speed of BTB charge).
Second was when I was facing a fellow ash tail person. He was low on health, so he retreated JUST behind his forcefield (still lockdown) Then, he sat down, thinking he couldnt be hit. At this moment, I charged the BtB, and released it, hoping what the wiki said about it hitting through fircfileds was correct. It was. Ash tail guy = dead.
Lastly, my favorite occurrence was when a Vog cub player popped around a corner AS SOON as I released a BTB charge. Itsent him flying into a shock pad. Then I got GF'ed a few moments later.

Back on topic. If you want a precise weapon to kill those annoying wolvers, debilities, trojans, and PvP victims (With a precise charge), then FR is for you. If you want a crowd control piercing weapon that clear any type of mob with it's charge (yes any mob: I tried the charge on mecha knights as well as slag walkers. Knockback was the same), than get BTB.

PS: If some grammar and/or spelling is a bit off, blame iPhone keyboard + crap Internet connection.

I notice you have the Argent Peacemaker as part of your general set. Don't. It's a terrible gun outside of FSC because it does tiny damage against everything except undead and fiend and fiends are difficult to hit (devilites dodge and greavers move very fast). I'd carry a Polaris or elemental alchemer instead of the AP. Those are great at killing turrets, retrodes, zombies, and anything else you'd ever want to shoot. No gunslinger should be without one (or more, so you can pick and choose for different levels).