[arvin555]

Hmmm, some of your drosera species I have no experience yet. But I think your plan is a bit complicated... try the KISS method. Keep it Simple Sam!

My suggestion, and what I do:

1. Water tray under pot, not too deep though.
2. Cover the top with some kind of moisture cover, I use plastic cups or plastic bags.

I am under the impression that the plantlets do not want to be come wet from above, that is why I just make sure the water tray always has water.

Just control the temperature so that they won't get too hot or too cold.

That's it!

Putting them in terrarium should work well as you planned, but I don't know about the misting part. As long as the medium is moist and there is no germination yet, I don't think it will matter much.

TTFN
Arvin