Also, play in adverse weather conditions. Rain, strong wind, and snow are your best friends, as these keep archers off your back and wear down those heavily armored foes. Your javelins and darts are unaffected in bad weather to boot. If the game persists in handing you perfect days, stick to forests. Again, this will help counter your opponents strengths. Caravel is absolutely right, Naval superiority is a top priority as the Irish.