Alot of smartass planners i know doing acst/law coz they working on some super clever plan that if pulled off in future would seriously...be good. (I have my own plan of course which I think is better). Sworn to secrecy, therefore will not expose beneficial exploitation publicly, which would....be bad.
With the degrading employment prospects for actuarial grads and the huge demand for computer skills in general, I'd say actuarial/comp science is probably the most promising. Put it this way, not every company can afford an actuary. But imagine if you can work for some software company designing software that uses actuarial models to simulate contingencies, there'd be a huge market to sell to. Look at what MYOB or Quicken has done for the accounting industry. A few decades, people used to write out each transaction on paper. With actuarial software, even fish n chips shops can determine their net present values of future inflows, or expected provision for bad debts.
(excuse my language, ive juz finished writing 3 econ essays, hence i sound nerdy...but im not. flyn however is =p).