I don't do tanks or rta's because they are tall, have glass and a lot of parts. With squankers you have to give up something, like the box is biigger or there's no TC and I don't do mechs.Sounds like a pita, just use a squonker. I use the narda or hadaly on my squonk setup and they both drain pretty much completely back into the bottle after I squonk, just enough to wet the wick. I set it below 420F and that way I can also vape it pretty much dry without burning the wick if I forget to squonk. I have it in its side in my pocket all the time and it's never leaked.
Either that or use an rta.