|The Dread Pirate Hurley|
Okay, I'm pretty sure I understand now. The clarification about unleashing your powers was very helpful. Infinite Powers acts as wildcard access to an ability that would be useful in the situation at hand, at the cost of hastening me towards my doom. Likewise, Dark Visions acts as a free question at the same cost, etc. etc. for the others. They're abilities, but I can only use them when I get access to them by filling my doom chart. At the start, I have one available to me. And unlike most other abilities, using them isn't free because I must advance the doom track each time.
With that understanding, Infinite Powers seems like the best one to start with. It plays very nicely with the discharging.