Three mics are enough for a good drummer who can balance the sound of the kit without any
help but unfortunately these drummers are rarer than you might think. Hence you'll almost
certainly need a snare mic and possibly the odd tom mic. I would suggest you go for a
decent kick mic and decent overheads but maybe add a few of the budget Yoga (or Pulse)
D606 mics to add a little weight to the toms if needed.
JRP Music - Audio Mastering and Restoration.