I do really like the T18e - was the first vape I got, and have never really found anything with a more satisfying draw so still have one (or T18II now) even tho it's coils don't last too long either - a bit longer than the Zenith ones, but still not more than maybe 10ml of liquid at best.
Re. liquid - do you have any recommendations for ones that won't ruin a coil too quickly? Ideally something I can order online in UK? I do tend to go for sweeter liquids, which I know can clog up the wick - still trying to find a good cream or peppermint flavour (not spearmint!) that won't clog up too quickly, but maybe those ones are always going to be coil-killers? The best juice I've found for the T18 btw is Vampire Vape's "Dawn" - fruity menthol, but not too sweet, never get bored of it - like to have a bit of variety in my secondary tank tho!
Anyway, have ordered a Nautilus 3 and some 1.6 coils, so fingers crossed...