A: Go to the marketplace with Rikku.
B: Go to the marketplace without Rikku.
These options basically read:
A) Meet Yosuke.
B) Go check out Tom Nook's store.
We've been to the marketplace with Rikku already. It's not a bad decision, but it's not brilliant. Yosuke is another Al Behd member, he has links to easy food, but we can already get food from him via Rikku or free from the cafeteria. He does also share a room with Amir, which is another possibly better way to get in contact with him.
Tom Nook on the other hand is an Anthro, who is willing to deal with humans, so we would be able to find a limited amount of information out there. Definitely an idea to consider.
C: Go to Seventh Heaven with Rikku.
D: Go to Seventh Heaven without Rikku.
These 2 are shots in the dark at a place we left hastily after a fight. Sure, we might run into someone useful, but it's definitely not a worthwhile choice.
E: Ask Rikku for directions to the Anthros' park; travel to the park with Rikku.
F: Ask Rikku for directions to the Anthros' park; investigate the area without Rikku.
These are the most direct way of scouting for the sidequest and also, easily the most risky. Rikku is Al Behd and taking her into hostile territory with no idea what we're facing is absurd. Going without Rikku is better, but still carries an element of risk. It would be better to have some knowledge before we blunder in.
G: Attempt to speak with Odessa in Room 101.
Odessa has made it clear that she's not going to tell us what we want to know till it's time. She holds all the cards at this point and we won't be able to pressurize her into anything without poisoning her towards us.
H: Ask Rikku where to find Jax Briggs, and attempt to speak with him.
This is what I believe is the best option. We further ingratiate ourselves with the Al Bhed, by talking to someone who has some influence and some money. He will have information about Canderous, who despite his Social Link, we still know nothing about and probably about the Al Bhed.
J: Attempt to gain access to Vercetti's headquarters with Rikku.
K: Attempt to gain access to Vercetti's headquarters without Rikku.
There is no reason for us to do these whatsoever.
So, for those reasons, I'm voting H and would urge you all to do the same, with B my second choice if I had to make one.
--
:D