We're currently at Heartlessness 8.
I am only dead set on Apex and Sorcerer, the others are just nice.
[X] Apex Flight
[X] Sorcerer of the Adamant Circle
[X] Subduer of the Wyld
[X] The Blade of the Battle-Maiden
Apex Flight is a must. It reduces the effects of Heartlessness, which I'm sure all the people who care about that will love, it gives us pull with the entire Celestial Bureaucracy, and 250k (the amount needed to buy down a point of Heartlessness, for those who care about that). Seriously, Apex Flight is my "must have, or I will not support any plan" option.
Sorcery is incredibly useful, in general, and particularly in 3E. Other that the general incredible usefulness of Sorcery, it has some other benefits: its general utility provides benefits to all options. It increases the odds of reincarnation. It leaves caches for Ulyssian. Finally, it further increases Ody's legend among the demons.
The Wyld option makes all fae fear Ody (and thus Uly), and it basically makes him an Ishvara, suborning their legends within his own. It increases and stabilised Creation. Also, the increase in wealth will likely improve any projects Ody undertakes.
With all the above three our legend will be consolidated within Creation, Hell, Heaven, and the Wyld.
BoBM improves our Blade, gives us Artifact 5 armour, deepens our relationship with our Fate Ninja, and gives us an Elder Gold Sidereal in the Second age.
What would the effects of Odyssial cruising around at 10 Heartlessness be for an era? Still I want everyone to note that it's in our best interest to gain as much Heartlessness as is possible to pay off since it defectively adds 20% to our Greatness, which actually reduces the end cost of paying off Heartlessness to around 100,000-150,000 a point.
Well I, at least, am not particularly interested in Apex for its XP. It is an opportunity to further Ody's perfection, standing above all including the Incarnae, plus it lowers the effects of Heartlessness, which people seem to like.