I've spent the biggest part of this year using MTL tanks as i had being using DL tanks for around 3.5 years.
Anyway tanks that i currently use for MTL are,
Coppervape skyline with the smallest air disc supplied in the box. I use a 0.55 clapton coil in this tank @ 36 watts. This tank can also be used for DL also!
Digiflavor Siren V2, This tank will suit any style of MTL as plenty of different size holes in the AFC ring. I've tried a 1.02 ohm coil in it and currently a 0.44 alien clapton in it @ 33 watts which is great although i'm going to try a 0.65 ohm in it next to see if that is better suited to me.
SXK doggystyle, again great little MTL tank and very cheap. Running a 0.7 ohm coil in this and again works well. I find this tank a bit of a pain to coil up as i have " Fat fingers!"
Aspire Nautilus 2, I love the 0.7 ohm coil for this tank. A great little tank and if your not into putting your own builds into tanks this is a great choice. Great AFC also.
For me up to now i personally like the Coppervape Skyline as my favourite followed then by digiflavor Siren V2. This may change when i put a 0.6-0.7 ohm coil in to the Siren and see how that goes.