If you really wanted to go for the esoteric aspects of the chakras you'll have to do the intense naval-gazing that Ranma is heavily disinclined to do IC. However, opening and refining a chakra will apply minor benefits along the lines of those powers. So...less 'gift of gab' and more 'puts foot in mouth 24 times a day instead of 25'. That's still a markedly better improvement for Ranma though!
Yeah, I figured it'd either be minor or heavily combat slanted.
Well, might as well look at the others and see if there's exploits.
Vishuddha...
Oh come on, this is too easy!
Guilty feeling is the most prominent reason for this chakra to block the Kundalini energy moving upwards?
Well that's piss easy. Ranma is Genma's son and feels no shame at all in doing what it takes to achieve his goals. This chakra is probably damn near
pristine.
It's supposed to turn negative experiences into wisdom and learning when open? Ranma already does this shit, he gets the crap beaten out of him and uses the experience to learn new moves and turn them against the people who beat the crap out of him.
When closed, decay and death. When open, freedom from disease and old age is a pretty nice benefit though, and something Ranma may actually pursue. It would certainly explain how so many geezers are still so spry, and the sooner he unlocks the ability to stay at his peak the better. Pretty good actually.
Can be opened with meditation, singing, instrumental music...
Come on. Ranma just starts belting out ballads about how goddamn awesome he is, and instrumental music is vague. Using instruments of destruction to beat up his enemies to a rhythm, well, that's certainly music to
Ranma's ears.
But perhaps the most interesting bit:
When Vishuddha is inactive, this nectar is allowed to run downwards into Manipura, where it is consumed, resulting in physical degeneration. Through practices such as khechari mudra, however, the nectar can be made to enter Vishuddha, where it is purified, and becomes a nectar of immortality.
I think Ranma's interested in this. Just to his mind, "This crap is clogging up my Manipura. If I open this, I can clean this stuff out, make my Manipura better at the stuff I like doing,
and keep my health longer. This is great!"
Seriously. So far this may be
the chakra easiest for Ranma to actually master via enlightenment. He comes about it from completely different angles than what he's meant to, but the result works pretty well for him.