IMO neither are good NG options or worth investing in the softcap for. These archetypes (particularly Arcane) in BB don't run and play the same as other Soulsborne games. They're just baked into the weapons and for boosting Transformations & Abilities (This sounds like there's a lot to it but there's really not). It's something you want to do and is fun in subsequent runs too.
Kos Parasite (Arcane), Holy Moonlight Sword (Arcane - Transformed Attack) and Bloodletter (Bloodtinge) are all weapons you get during the DLC too.
If you really wanted to run Bloodtinge, you could complete Cainhurst early to obtain Evelyn & Chikage (2H Mode). If you're new, guns are actually good for clearing weak mobs and dealing with dogs.
Now that I think about it too, there's an earlier point after beating BSB and unlocking Chalice Dungeons, where you could try looking up Glyphs for early game CDs, that might have weapons available for purchase at baths. This is another thing with Arcane or Bloodtinge builds, you also need to buy or find Lost/Uncanny versions of these, and get the right Blood Gems for them to really pop off.
Also the consumables like the Eye that scale with Arcane and Bloodtinge are largely shit too outside of specific use cases.