I would steer you away from Devil Dog unless you are
ABSOLUTELY sure you want a no-holds-barred
tobacco (that is not a challenge or reverse psychology). Sometimes I think people are certain they do, until they get it. Have you tried (m)any other extracted tobacco juices? Maybe Want2Vape, GoodeJuice, DarthVaper, Vaperite?
I think Smooth Criminal would satisfy that urge while providing you with a easier pathway to be ushered into natural tobaccos. Caramel Pear Black Tea is another conundrum. While I love absolutely everything you mentioned, I get apprehensive with suggesting juices like that to
some, cause (if this makes sense) I think they are advanced juices.
Wlad doesn't sell any 510 attys and I would recommend those before messing with adapters (I hate adapters). Empire Mods sells great 510 attys for cheap but you can only use them at 3.7. (You could get a 306 though.) I don't know anything about the twist and how you know what voltage you're at, but just stay at 3.7v.
Devil Dog doesn't need steeping, but the others will require a cap off 48 hrs steep followed by (IMO) at least a week.
In summation, you can do what you want and order how you wish, but some flavors may give you a skewed perception if you are not used to that level of sophistication. I, by no means, am saying you are not sophisticated, but I went a long time before trying Ahlusion and don't know how much I would've appreciated them without a lot of others to compare them with. Maybe start out with some flavors from Ahlusion that are not
as complex. I haven't tried the Grape Vine yet, but I heard it's awesome! Whatever you get, don't truly judge them before (at least) 3 weeks -- the steeping is an evolution of major proportions.