Honest to god, I had to look up all the zoros just so I got their names and specials right... so confusing sometimes...anyway!
- Strong World Zoro (the bowler/shotgun): Special is 1k fixed Dex damage, captain increases Dex ATKx3 when HP is under 30%
- Asura Zoro (storymode): Special Deals 15k Dex attack to all enemies, captain boosts dex hp/atk x2
- Streaming Wolf Sword Zoro: Special reduces damage from STR by 100% for one turn, captain is same as lion song below
- Lion Song Zoro: Special deals 25x character ATK DEX to one emey, captain reduces damage by 80% if full health
- Kimono Zoro: Special Reduces Bind duration by 2 turns, deals 10x character's ATK in DEX damage to all enemies, captain Boosts ATK, HP and RCV of DEX characters by 1.5x
- Log Zoro: Special Randomly changes BLOCK orbs into either QCK or DEX orbs, deals 15x character's ATK in QCK damage to all enemies, captain Boosts ATK of QCK and DEX characters by 2x
- HW Zoro: Special Deals 7x character's ATK in QCK damage to all enemies, delays all enemies for 1 turn, captain Boosts ATK of QCK characters by 2x
- 3D2Y Zoro: Special Changes own orb into STR, boosts ATK of Slasher characters by 1.75x for 2 turns (3 levels), captain Boosts ATK of Slasher characters by 2.75x if HP is below 30% at the start of the turn
With all that, I honestly think that the order should be:
1. 3D2Y. It's an amazing sub unit for the already overpowered slashers. 4 sockets give you a lot of room to work with
2. HW Zoro. I use him constantly, mostly since he's easy to get and max his special, and his special is pretty great for delaying a turn. 3 sockets is good too, and his ATK is one of the higher we have for QCK unit slashers right now that's not RR dependent.
3. SW Zoro, since he has 4 sockets. He's still slasher/driven like all of them, but more sockets, and is a good beatstick
Then move onto...
4. - Log Zoro: Mostly for his captain ability and special being better than others. This is just personal preference
5. Lion Song/Asura for newer players. They get outclassed, but both helped me early on. Asura is a good beatstick at least.
6. Streaming wolf. Guarenteed block against STR is niche (and why are you bringing DEX to a STR party?) but hey, maybe in the future we'll be limited to teams?
7. Kimono Zoro. There are better ones than him, and with sockets he's not really needed