In a single number what would be the ideal daily caloric deficit?

[Tapeworm]

2 whole eggs, a glass of milk, 1 banana and a teaspoon flax oil and then masturbate all day.

Stop hacking my webcam.

[El Diablo Blanco]

7, as in 7 calories per pound of your weight.  They claim 10 is the number to maintain, so 7 would be good for lean gains

[Metabolic]

Lean enough, no more than 300

[dj181]

let's ask will brink