First of all - thank you for posting those pics - It is much easier to see what is going on! Ok. The top bud looks a little crispy but holy shit it looks like there is a lot of good buds underneath! The color of the leaves is normal for week 6 of flowering. In the next few weeks, expect many to wither and die - its all good. At this point, the plant does not need any more nitrogen. Just some P and some K (0-1-2) and dont over do it. Its kinda funny actually about the mold - I think that the exact same mold strain was chillin on my plants. Looks like my leaves did. Fuckin mold.
Anyway, I was medicated and misplaced my camera somewhere around the house. As SOON as I find it, I will show you my plants. I feel like an asshole for not posting them already. Peace.