Dex character, compairison of options please?

I'm currently building a lvl 120 dex based pvp character, my current setup is about lvl 40 (rather new character) and is set up with 14 str for iato and the rest in dex, so he's god all of his options open. What I'd ask of anyone who would answer is to give me their opinion of the available options I have interest in pursuing, so that I may make a better decision with that knowledge. The following options are the ones I'm interested in:

Murakumo: 28 str, 5 attunement slots and pyromancies with a sword that is by all accounts a powerhouse

Dex/Faith: little sketchy on the numbers here, but from what I understand the standards are 30/30 or 40/30 or 30/50? If I went this I'd prefer a 40/30 split (DEX being at 40) because I'd dislike relying on a buff too strongly

Dex/Int: Not entirely sure about this one at all, I've only seen it mentioned and I do enjoy INT spellcasting, but I am not sure how this would work with a build like this, any explanation on this one would be appreciated.

Im working on Dex/fth/int build but I go higher than 120 :/

Just go w/ a straight dex build and complement it w/ pyro. W/ the high dex your spells will be considerably faster w/out needing to invest in more SL. Max out End, Vit, and Dex and buff w/ either fire or lightning on a +15 dex weapon.

You could also mainline dex but put a small investment into int and rock a Dex/Oolacile/pyro build. The oolacile builds apply great magic weapon with an oolacile catalyst for roughly a 200 point magic buff. This beats gold pine resin by about 50 and fire resin by about 120. It also doesn't require pine resin farming. It only costs 5 SL (assuming you start as a pyro), and it also gives the flexibility to cast great soul arrow (PVE) and to use chameleon, light (PVE ToG), the magic shields, and fall control.