Foci are nice because you need to stack specializations: you can't have a +4 Fire Power bonus without a +3 elemental bonus, a +2 elemental bonus and a +1 elemental bonus.  That's 10 points of specialization bonus, or 5 points of refinement.  

A +4 offensive focus, on the other hand, only costs 2 points of refinement.  

Ever seen a Denarian after being hit with a falling Hindu cow?  Not pretty

I gotta ask:
Was it the cow that jumped over the moon, or the herd shot 'round the world?  

On a side note, I've got a mathematician NPC in my current game who is working on things such as probability theory, quantum mechanics and other such points... and who is Sponsored by Lady Luck.  As my players commented, "wait, so he's researching his patron?"

@Sanctaphrax: glad you approve.  any thoughts on how you might use this or flesh it out?

@Mindflayer94: I think a new thread, titled in the same format, might be best; to mitigate confusion, if nothing else.

Being actually blind with no alternative to sight would likely be a fate point gold mine, but that really would be balanced out by the fact that they are going to have difficulties a lot.

Resources compel: "Um, yeah, you mixed up your singles and tens last time you did the 'unique fold by value' thing.  You just overpaid by an order of magnitude."
Lore compel: "Two words: Braille.  Spellbooks.  Not. Common."
Contacts compel: "Uh, yeah, apparently your clothing clashes so bad that it can induce glaucoma at twenty paces.  Nobody really wants to talk to you."

Ah, the Disability Superpower.  Good to see that's being of use to someone.

Well, first off, when you define those other senses, make sure that they're defined in such a way that being blind is still actually a handicap, instead of just flavor, so that you actually get a refresh rebate from it.  Daredevil is a good example, so I'll go with that.  He's got a wonderful suite of abilities, but the downsides are annoying, to say the least:
Being able to hear with the fidelity of a bat is great--until you try to focus down to one thing and pick it out of the noise, or even just try to get to sleep.  Outside of a sensory deprivation tank, restful sleep isn't going to happen much.
Any strong smell will be incapacitating; you'll probably have to make Discipline rolls regularly when the skunks are marking their territory and before garbage day (or, alternatively, walking through a restaurant district will be... distracting).  

As for a suite of 12 powers, I'd suggest that you have the regular senses--smell, taste, touch, hearing--as "always on" with a "+3 to Alertness & -2 to Investigation" (your situational awareness of the environment is making it difficult to focus on any single thing) that can be swapped to "+4 investigation, Alertness drops to Terrible" in the vein of Listening (you're focusing on one thing and losing out on the situational awareness).

Then, for the other 8 senses, have them require some activation, like a Discipline check, representing the focus needed to take an already exceptional sense and refining it into something new.  Like Hearing becomes Ultrasound for a short period of time, or Smell/Taste becomes chemical analysis (with a Scholarship check, probably), or you manage to get the vestigial magnetite crystals in the human brain to work and suddenly you're a human compass (or GPS), or become the human lie detector (again, channeling Daredevil).

As for it being fun, that's really up to you and your GM; some GMs will go "Oooh, cool character, let's work together to make you awesome and epic and tragic" while some others I've played with will go "Oooh, guilt-free buttmonkey for me to abuse!"  The only solution there is to talk with the GM and find a consensus.  (trite and cliched advice, I know, but there's a reason for that: it's also true).

Looks great!

I suppose I should report on how the session went:
One character, after having spent the entire scenario saving up 14 fate points, walked up to the cloud of imps harassing the wizard, and with good choices of stunts and a good roll and after tagging:

Budding Marine Officer
"To err is human; to forgive, divine. Neither is Marine Corps policy."
Military Brat
"Hard things we can do right away. Impossible things may take a bit longer."
Something To Prove
Off The Edge Of The Map--Here There Be Monsters
There For Those Close To Me

Rematch! Rematch!
Infernal Pests
It Was A Monster Mash...

proceeded to destroy all of them in a single exchange. 

And then walked up to the other cloud of imps on the next exchange and made an intimidate roll, tagging "Wanna see me do it again?" 

They boogied.

So, reached the climactic scene of a scenario; the warlock has been exposed, and it's time for the Monster Mash in the ballroom (literally!).  He's called in his entire little army of summoned and bound creatures (some demons, a shapeshifting assassin (think doppleganger), some manticores, and... a bunch of imps.)

Now, it's the imps that are a problem; I've adapted them from Sanctaphrax's imps (over on the wiki), but they're very weak individual combatants, better used for recon.  On the other hand, there are something like 50 of them (all shouting "Rematch! Rematch!" as the PCs have squashed their little forms before and as a nod to the Spectacular Spiderman's Mysterio) so a large flock (murder? cloud?) of imps still seems like a threat.

So, two questions:

First, more generally: how could you handle a large mob of weaker individuals in this system? 

Second, as an applied answer to the first question: How to handle the specific question of a flock of ~50 imps?

The answer I've been toying with is an aggregate "creature";

incomplete general idea:
High Concept: "Flock Of Imps"
Trouble: Rematch! Rematch!
Aspects: Mob Mentality
Infernal Pests

Great or Superb Fists (to illustrate the group maneuvering and aiding each other enough to add significant punch to their combined blows)
Superb Endurance (wow, there are alot of them...)
Fair Athletics (they're still a pretty big target)
Inhuman Toughness (they are still demons)
The Catch (in addition to Holy Stuff, AOE attacks affect them normally)


Thoughts?