I agree with Buhallin. You resolve the effect each time you do step 4 in combat. It clearly states you calculate the number of defense dice by taking the ships base agility and resolving all card abilities that modify it, and then add an extra die for primary weapons at range 3. So you resolve the abilities every time.
And as stated earlier if initiative and/or chosen order of resolving is in play here we will get very inconsistent results.
