In a planetary invasion the advantage factor is based on 3 elements soldiering tech and courage.I read that the invader has always a +5 advantage factor due to air superiority.My question is how soldiering, tech level affect advantage factor?What is courage how it influence an invasion, there is no mention of courage during an invasion.Another important question is does number of invaders affect advantage factor, or the advantage factor don't take in account number of defenders and that of invaders?About special tacticts if i use mass driver that adds 100 to 200% advantage factor but have 0 soldiering and low tech level will my advantage factor will be always between 10 and 15 because of +5 of air superiority and +100%-200% advantage factor for mass drivers?