1) The plants will become salad to the African Cichlids. They will shred them.
2) No drift wood. African Cichlids like hard-alkaline water. The DW will soften an acidify the water. Just the opposite of what you want.
I'm all for trying your own thing, but what your asking is a mix of decor that isn't what the fish you have would tend to have in nature. If anything, I would attach some tough rhizome plants to the rocks, like anubia.
I have never been lucky with African Rift Lake cichlids and plants. I have a driftwood piece in my mbuna tank, but it was totally cured for more than 3 years in a previous tank. So, it does not release enough tannins that may change the water pH.