Ok, to understand phase missiles, you have to understand mitigation.
Shield mitigation works like this. for every 10 dps a ship takes per second, it goes up 1%. It maxes out at 57%. It starts at 15%. Whatever the % is, that's how much damage will be negated outright. This is before the damage ever even touches the regular shields or the health & armor.
So, what phase missile teching does is take a certain % of the damage and makes it bypass shield mitigation and go straigt to the hull & armor. It actually works out to an equivalent +X% damage, but with the added addendum that phase missiles can take out capital hsips quicker than anything else out there
By default, assailants don't do any damage to bypass. You up it by 5,10,15,20,25,30 % bypass.
Because of the fact that the Vasari bonus comes against mitigaiton, that means phase missiles are ideal for picking out one target at a time and taking them out. Works GREAT on capital ships.
+1 Karma is appreciated!