around a 2.5-3ohm Atty would be a sweet vape at 5v James, its very subjective everyone has there own likes and dislikes, you wanna be around 3.5v--4.0v with that LR in my opinion, then once you crank the volts up to around 4.5-5v you twist on a reg ohm Atty and keep her wet, once over 5v twist on an HV Atty, and for 7.4 an XHV Atty. grab yourself a variable voltage Mod like a Provari, VV Ali'i, or even better save your coins for the next few weeks and try to get your hands on an Eclipse when they are released and you will start off like a king, anything with VV and
juice feed is a nice system because you can dial your Attys in to the sweetest spot and your
juice will peak on flavor as well, hope that helps ya out a bit