Shanks is mainly associated with haki, Blackbeard devil fruits, and mihawk swords
While each path is different I think each “power” might follow the same pattern. That pattern imo being each going back to mind, body, and soul/spirit
Haki is pretty self explanatory
Haki being an extension of each
- Observation being of the mind
- Armament being of the body
- Conquerors being of the spirit/soul
- Paramecia being powers that are based on the mind. Them being all about dreams and creativity
- Zoans being powers that are based on the body. That being pretty self explanatory
- Logia potentially being powers that are based on the spirit/soul. Maybe changing your spirit to reflect that natural force
It also applies to the awakenings of those fruits. While yes you need your body and mind to catch up to the powers the powers you get still reflect each
- Paramecia awakenings allow you to in a way expand your mind to affect things in your surroundings. Including inanimate objects
- Zoan awakenings just gives you access to an overall stronger better transformation enhancing your body further
- Logia awakenings although we don’t have any confirmation what it is yet it probably relates to the spirit. If the theory of them being able to make separate living things based on their logia powers similar to big moms homies it’d make sense. It basically giving life/soul/spirit or whatever you want to call it to their powers
Like for oden and his blades I think
- Enma representing body. It obviously having ties to armament haki
- Habakiri representing mind. While we don’t know much about it I believe it also had its own special effect related to senses/observation haki
- Both blades being opposites and balancing each other out
- Him not having a blade to represent spirit/soul
- Enma -> body -> armament haki
- Pushed against king with him being a super durable and enduring dinosaur zoan
- Wado -> mind -> observation haki
- Potentially being pushed against shiryu with him being a sneaky invisible man
- Sandai -> spirit -> conquerors haki
- Idk if asura is necessarily conquerors but both are tied to spirit. Like I think logia’s might be related to spirit but yeah I don’t think conquerors is connected
- Potentially being pushed against whoever the next major battle after shiryu idk
Shanks having full on mastery of each form of haki observation armament and conquerors
Blackbeard maybe not having full mastery of each of his fruits but at the very least getting 1 devil fruit of each class. With him currently only missing a zoan to finish off the trifecta
As for mihawk maybe with yoru being a supreme grade weapon and the strongest black blade it itself represents all 3. So unlike oden who needed 2 blades to represent mind and body or zoro who has 3 to represent all 3 yoru is just that special a blade