Gonna give the shops a visit tomorrow. Let's see how much freedom i can get.Just to comment on a couple of games. For Warzone, you really would want 16gb. FC6 not sure but would suspect it'll be quite memory intensive as well.
Would be worth taking a risk pairing single bought sticks of same specs for dual channel to give your hyperthreaded dual core processor the best chance it can because it's going to be thread challenged extensively. Can you return ram in case mixing doesn't work?