I currently use...
Black Kat set, Final Flourish, Storm Driver, Savage Tortofist, Polaris
For zombies I keep single switching Storm Driver till I get close enough to use Final Flourish and keep double switching it with storm driver or single switch it on cornered zombies.
For trojans I wait for them to attack and keep single switching Final Flourish, usually takes around 1-2 rounds of assault to kill one trojan.
I use Polaris on turrets, when cornered or to push zombies or trojans away from my party members to protect them.
For the boss fight I use Savage Tortofist charges which act as a blend between Blitz Needle and Shivermist Buster doing decent damage and providing some crowd control, where the lodged shards prevent lord vanadioe from passing through with his dash while also doing damage.
So, the thing is... I got kicked from more than a party with the excuse that I'm "slowing them down" so I was thinking about crafting a set to use in FSC which is...
Chaos set, Voltedge, Warmaster Rocket Hammer, Electron Vortex, Blitz Needle
Or I can just get CTR med UV's and still use Black Kat set.
So, my question is... Is crafting a set dedicated for FSC worth? Or should I just stay with what I use now?
Regarding your first set: It is creative and I believe you that it works well. Congratulations. It's disappointing that other players can be so close-minded. Have you tried charging Final Flourish into trojans? Solo, at least, it should kill them. Have you tried killing turrets using Storm Driver? Because they can't move, they're easy targets for alchemer ricocheting.
Regarding your second set: It's so orthodox that you should have no trouble being accepted to parties. And yes, farming FSC is common enough that it's reasonable to craft a set specifically for FSC.
But I would like to propose a third way. In each of your sets there is redundancy (Storm Driver vs. Polaris, and Voltedge vs. WRH), simply because four weapon slots is more than anyone really needs. What if you, for example, replaced Polaris with Blitz Needle? Then you might be accepted, but with a set that you mostly enjoy, and without spending a ton of resources.