Firemind's Foresight doesn't have anything to do with Laboratory Maniac. SB Foresight, maindeck Intuition and a 2 drop is a package you can slot into the deck. (Laboratory Maniac is another such package, and so is Emrakul, or Release the Ants). You can run FF with Release the Ants, and you can run Lab Maniac without FF. FF is intended to solve two problems:
1) Minimize the number of cards needed to go off with Dream Halls.
2) Solve the problem of you casting Show and Tell, they put in something like Ashen Rider, and you only have one business spell (so you can get either Trickbind + another Cunning Wish for your kill, or another draw spell to dig and Cunning Wish for Trickbind).
Basically, I look at it like this. Here's the core of the deck:
19 Land
4 Show and Tell
4 Omniscience
3 Dream Halls
4 Enter the Infinite
3 Cunning Wish
4 Brainstorm
4 Ponder
4 Preordain
4 Force of Will
3 Pact of Negation
Sideboard:
1 Intuition
1 Trickbind
3-4 Leyline of Sanctity (depending on maindeck)
3 Defense Grid
1 Slaughter Pact
1 Wipe Away
1 Pact of Negation
1 Noxious Revival
And these are the packages you can play:
Firemind's Foresight:
1 Intuition
1 Trickbind or Impulse
Sideboard: 1 Firemind's Foresight
(Optional Sideboard: -1 Intuition)
Emrakul:
1 Emrakul, Aeons Torn
Sideboard: 1 Eladamri's Call
and one of these two:
Sideboard: 1 Release the Ants
Sideboard: 1 Research // Development
1 Laboratory Maniac
And then you have a few maindeck options like
Gitaxian Probe
Leyline of Sanctity
4th Cunning Wish
20th land
Extra counters
and extra sideboard slots like
Extra counters
Sapphire Charm
Extra bounce
Extra GY hate
Obviously people have made other lists and finished with them that didn't look like this. But the point is that more than almost any other deck, the pieces are really unconnected. You could run an Emrakul with Lab Maniac. You could run Firemind's Foresight with Release the Ants. You could run both or neither. Once you have the core of the deck in place you can do whatever you like. It's mostly about what metagame you expect (the Emrakul package is good against Death and Taxes for example) and what scenarios you think are going to come up and how often.

