I have had leaking from the very best tank which accepts the ego one mega coil. I don't like those tanks, but it's because I can't get them to read correctly, although I THINK I may have figured out why.
I keep meaning to get one but they are getting hard to find, AND in case I am wrong I don't want to give anyone on this thread more fodder for amusement at my tragic failures..
BUT, the best tank (the Oddessy, now sadly discontinued) will leak, and yes,, toward the tank emptying. I's usually my coil either not screwed in ALL the way, or I am in need of a better wicking job.
If you are getting your tanks to read, consider yourself fortunate. LOL. But, I would probably focus on the coil itself a bit.. They can be finick little buggers.
You could try other tanks there is an exhaustive list somewhere on this thread. The tron -S (also sucks in my opinion when it comes to the connection AND it is ugly as sin) especially the gynecological pink one. But, you could give them a shot, I guess. I tried a Wismec tank and got some life out of it with no leakage, but I'm fairly sure you can probably fix the leaks you are getting in the tanks you have.
Good luck,
Anna