IMO dual coils especially in a tank are unnecessary, and in many cases counter productive when it comes to flavor production.
Yes I know there are some that may disagree, but that's the beauty to modern vaping, we all have a nearly unlimited variety of configurations that allow us to dial in what we like.
As for me I'm a flavor junky, I greatly value flavor over cloud production, but that's not to say you have to sacrifice one for the other, you have to dial in fine balance between the two to suite your taste.
Now as far as Ni200, Lemo and DNA40, there is no better match the Lemo is a perfect platform for Ni200 builds.
And trust me when I tell you I've, bought, tried and either sold, traded or gave away nearly all currently available tanks including the Atlantis and Kanger sub tank and so far only only the Lemo has been able to give me the vape that I like.
I do have a Delta 2 with RBA deck, and extra LVC coils on order that I'm anxious to try out with conventional and Ni200 builds, the RBA deck is supposed to be identical to the Lemo, and I can't wait to put a Ni200 coil in one of the LVC heads and try it out.