Two quick 1602 A.D. strategy questions

  1. How many small warships would be necessary to beat down a large one in a battle? I’ve estimated that two would do, because small ones have 8 guns each, a big one has 14, but that doesn’t work out. Is there a rule of thumb?

  2. I’m considering to deprive my opponent (with whom I’m at friendly terms now) of his iron ore by simply buying every unit of iron or iron products he’s offering right now, although I have mines on my own. The idea is to save my resources, while his will have run out by the time I’m starting to fight him, cutting off his iron supply. Would this tactic work, or can iron be bought from free traders without any limits, even if every producing mine on the board would be under my control?