Yea. With the Denarian Party, I'm basically going to let them make their own plot, and kind of develop the sessions around what they're trying to achieve. With the Warlock Party, there's going to be a lot of social going on. Meeting the who's who, and a lot of spelunking, looking for lost tomes, and items of power. Occasionally facing off with the Denarian Party, if they upset the balance of power in a negative way. Finally, the Church is occasionally going to be thwarting both of them, and doing general protection of mankind sessions. They may run into the other groups one out of every 3 plotlines

Good thing its online lol. We're going to be doing all encounters via chat, and all roleplaying via post.

Timeline is a good idea. I didn't think about that at all.

Any other tips?

The main reason a lot of GM's(in my experience) discourage min-maxing is because the characters tend to be one dimensional. As said in WoJ "When all you have is a hammer, every problem is a nail"

FEEDING DEPENDENCY [+varies]
Description: Some or all of your powers come from eating something. Probably something weird.
Skills Affected: Discipline.
Effects:
Restricted Powers. When you take this power, you must select at least one other power that you possess. You must also choose a thing and an amount of that thing that you must consume in order to use those powers. Which powers and foods may be selected with this power is a matter of the GM's discretion. This power provides a variable Refresh rebate depending on how much power is selected with it. If 2 Refresh is selected, the rebate is +1. If 6 Refresh is selected, the rebate is +2. If 10 Refresh is selected, the rebate is +3. And so on. The above values assume that the food is rare or morally objectionable, like significant amounts of human blood or huge piles of cash. If the food is acquired easily and without guilt, or only with extreme measures, add or subtract an appropriate amount from the Refresh total used to calculate the rebate. If more Refresh is attached to this power than is required for the rebate received, this power provides a free mild hunger consequence for each additional Refresh.
Feeding. You are capable of consuming whatever your food is. Furthermore, when you do so, you may remove any hunger consequences that you possess and recover any powers that you lost to your hunger. If you consume an insufficient amount of your food, you may receive partial benefits at the GM's discretion.
Limited Reserves. At the end of any scene in which you use one or more of your restricted powers, you must roll your Discipline skill against a number equal to the combined Refresh value of the restricted powers that you used. If you fail this roll, you must take consequences or sacrifice restricted powers with a total Refresh value and/or stress value equal to the amount that you failed by. If you do not or can not, you are taken out. This usually means that you die, get incapacitated, or go mad with hunger, but other fates are also possible depending on the character and the situation.

Adjustments for easy or difficult foods:

-4 A few hours of sunlight, other small downtime requirements
-3 Normal food in unusually large amounts, other stuff that's no real effort
-2 Weird stuff like copper, large amounts of downtime like sleeping for a week straight
-1 Diamonds, people singing about you, other stuff that's impractical but not really difficult
0 Blood, rare radioactive materials, other difficult stuff, massive downtime like spending months in prayer
+1 Vampire blood, other difficult and dangerous stuff
+2 Human sacrifices, other stuff that's a big deal, ridiculous downtime like meditating for a decade
+3 Angel feathers, other stuff that pretty much requires a quest
+4 Planets, other nearly impossible stuff

I just saw this in the custom powers master list. If I make his Domination power learned post Stokerlypse, what kind of rebate would he get if he has to feed on the phage of a White Court Vampire once per month to keep the power? I figure it makes sense to bind the power that way, as the black court now hates the whites, and the character already hates them enough to be willing to pay that price, since the black court now has one agent who is constantly trying to find and kill their enemy

You could go with 'fleshcrafting' - human form plus hulking size and a modified flesh mask.  Another option might be ninja-esque powers - cloak of shadows and spider walk.  Then there are the various types of sponsored magics, worldwalking powers, simple boosts like speed or recovery and more obvious ones like shapechange powers or wings.

The real question is, what did your character need to do to protect people and who taught him?

To answer the question....think of it like Maggie LeFay. He trafficked with a lot of different powers, and made a lot of pacts to gain/learn powers. I plan on making a couple of those into aspects, so I need to have something make sense. That's why I used the Black Court-Domination example.

As far as the why, in seperate incidences, he lost both his wife, and his daughter, to seperate supernatural predators, and wasn't around to protect them. His daughter was slain by a loup-garou( one of Macfinn's ancestors), and his wife was taken as a thrall by the White Court. Both times, when he pleaded to the local Warden, he was told there was nothing that could be done, as the loup-garou had dissappeared( little did he know that it had actually been slain) and that there weren't enough Wardens to spare to assault a White Court "base" (as they were dealing with their first killing of Kemmler), so while he didn't know the circumstances, all he knew was that his wife and daughter were to go unavenged, and the Council seemed not to care.

Basically, I'm making a Sorceror who feels that the White Council isn't doing enough to protect mankind, so he began searching and making pacts and bonds to gain more power. This has led him some dark places, and some dark forces. I want to figure out some interesting and appropriate powers. For example, I know he is going to have learned Domination from some Black Court vampires( before the Stokerlypse). I've got 12 refresh(total) to work with, knowing that 7 are taken up by Thaumaturgy, Evocation, and The Sight. 2 for Domination. So i've got 3 points of refresh to play with, and I have no idea what to do with them

I always felt that if Harry were to go back in time, it would be to Bianca's Masquerade.

We've been told that a lot more went down at that party than what we know about. Seems to me that, at some point, Harry would have to find out. He was too focused on the task at hand/ didn't know enough at the time to look for certain things. I think when he goes back, it'll be there, to spy on the guests.

edit: and, that deals with the whole "unable to change the past aspect" and "moral dilemma". He can't change the events of the masquerade, and that'll make him think. So, spying on the party without helping his past self would be the only thing he could do there