Lee 10lb bottom pour production pot with PID temperature controller & a small hot plate to preheat the mold. I have to agree with getting a larger pot, the small one drains quickly and the larger one would hold it's temperture better. Get (or build with parts from ebay for $50) a temperature controller for your pot, it makes a world of difference in the mold performance and bullet consistency. As a minimum have a thermometer in the pot, the temperature controller that comes with the lee pot is terrible.
Mostly water dropped WW for target use (9mm, 44mag, 45-70, 357, 308) and pure Pb for the antiques.
Flux with sawdust.
Lee Alox tumble lube (diluted with alcohol first), sometimes size with Lee push through die (and check if required), then pan lube.
Currently replacing my molds via castboolit group buys, far better quality than Lee. Largest is a 4 cavity, anything larger than that gets too heavy.
Lastly, but most important - GOOD VENTILATION. If possible, build fume hood for the pot and exhaust to a safe location.