Themis mesh deck. No not really. I haven't got it yet to recommend it. And it doesn't have premade coils. It just looks easy enough with mesh to not need premade coils. I'm hoping mesh does TC right.
Saving buying another tank while you figure out the coil part sounds like a desperate situation. The problem I've had, and even more so lately is rebuildable doesn't use drop ins, drops ins don't have a build deck or aren't clear that they come with a build deck.
When I won the Scion II it took the help of ECF to find a build deck in stock in the US and it's for the Scion I.
And when looking at getting something new suggestions end up like my first paragraph and recommendations are whatever I just bought even though it hasn't been put through the wringer. (Scion II with the rebuild deck can be a huge leaker BTW, that's one reason I'm getting the Themis.)
If you are in dire straits I'd go back to tried and true. Find a Kanger SubTank (preferably TopTank), later revisions were pretty leak free. Being an oldie money shouldn't be an object. If you have any problems with leaking builds there is a lot of knowledge how to stop them. Has premade coils, has a pretty easy build deck. The deck definitely works with TC (not sure if they have drop in TC coils). There is a reason SubTank has been my main tank that never gets taken out of service because of atmospheric conditions and I have 8 of them (whoa, I have a problem
), it's old reliable.
In my eye until top air flow most everything else is just a knock off trying to do SubTank better.
Then when you're not worried about finding another drop in coil tank while you figure out the build on a new tank you can try new stuff.
Or what do you have and what are your build problems with it? YouTube is great for getting build tips that are easy to follow.