well, WTG, but if I was you I would have just rearmed and landed 4 kills giving me more perks.
maybe I just got you wrong,
but rearming doesn't give no more perks. Landing four kills at once or landing 2 kills each doesn't make a difference.
However, of you are going for perks, rearming isn't generally not the best idea if you have already some kills. Chances are that you're going to get shot down, so all kills you had during the ongoing sortie are getting the worse "killed" mission end perk multiplier.