Recommend me best sub-ohm tank for flavour

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I'm on a eLeaf Pico Mega, currently using the MELO 3 with EC heads at .5 ohms, and I am underwhelmed with the flavour.

Note I have a heat sink which raises the 510 connection so I CAN accomodate a tank larger than 2mm.

Looking to achieve the best flavour without having to go RTA or RDA.

Ideally if it were available from fasttech that would be great.

Unfortunately, my currently researched flavour recommendations of Herakles Plus or Uwell Crown are not on Fasttech.

If any suggestions...

Recommend me best sub-ohm tank for flavour

Recommend me best sub-ohm tank for flavour