Good idea to start a thread like this - MTL vaping is not getting enough attention, I think. Maybe a list with MTL tanks I would recommend?
First one still is the KF4. People might belittle me for it, or find it somewhat weird - I've read quite a few people complaining about it being "complicated" / over-engineered and apparently some people find the juice flow control finicky and not well-designed. Can't really understand what the problem is, it was my first RBA and worked flawlessly from day 01, build 001. Oh wait, I had to do some black magic (adjusting the screw behind the positive pin) once...
Next in line (because they can be tricky) are gennies. Mesh really shines with lower wattages, so the Origen 2 would make a brilliant MTL tank.
Honorable mention for the GP Spheroid v3 for mitten's behind tight draw or v4 for either MTL or restrictive DL. The reason I like 'em is because they look the stuff on my epipes and are mini sized (16mm diameter I think?). And on top of that, you can't make 'em leak. Had trouble with my tanks spilling in my pockets because it's so hot outside but too much AC inside, so every time I left the house, to quote the Griffin thread: Sploosh! The Spheroids don't leak because of fluff - reusable, washable stuffing for the tank section that feeds the juice to the wick. Its wicking capabilities are way beyond what I expected! You should check em out! If you happen to use 16mm atties on your Reuleaux