Hmm well with the Baal perhaps go for a large black cross over the whole vehicle, so that it can be seen looking top down onto it. Not sure how to do that with the turret and all, I know I'd mess it up but would look pretty cool if it can be done I think and would tie in nicely with that front plate cross.
As to the Land Raider I'm not sure a full camo scheme would fit with the rest of the army. Good idea, but perhaps break the red up with a couple large chevrons instead, like how you have with the stripes on other vehicles. that would make it look different but still keeping with the same overall theme of red with angular/geometric black patterns on it.