well you're pretty light on troops tbh, you'd need to make sure you pin the big nasties with the stank, but you'll find that you'll need its cannon in the first few turns if against any army with warmachines, monsters or chariots.
you might find you get more mileage out of taking a cannon as an artillery piece and spend the rest of the points on getting more troops, as ytou wont be able to hold many combats with those few.
it might be worth considering dropping the lvl4 to lvl2, most people wont be able to take a lvl4 so a lvl2 should work fine