Brains, brawn (including boobs) and a touch of spunk*.
*Noun
1.
spunk - material for starting a fire
kindling, tinder, touchwood, punk
igniter, ignitor, lighter - a substance used to ignite or kindle a fire
2.
spunk - the courage to carry on; "he kept fighting on pure spunk"; "you haven't got the heart for baseball"
mettle, nerve, heart
braveness, bravery, courage, courageousness - a quality of spirit that enables you to face danger or pain without showing fear
