First off I am new to vaping I want to buy the eleaf istick tc200w. And two tanks one for me and one for my girlfriend. she is a MTL and i am a DL user. I plan on buying the aspire nautilus mini for her which i hear from here is a great beginner and MTL tank. And the kanger toptank mini which is supposedly a good choice for me. I want to understand a few things first off. The toptank mini comes with 1 x 0.15ohm SSOCC Ni200 Coil (TC) Atomizer Head (Pre-Installed) 1 x 0.5ohm SSOCC Atomizer Head 1 x Mini RBA Deck Plus. What is a good coil out of the three to start with? What is a RBA deck plus exactly? On that note what is a RTA, RBA, RDTA, and all those other ones i keep reading on here? I want a sub ohm tank if you have any suggestions besides the kanger toptank mini let me know. Remember I am a beginner on all this so I don't want to big of clouds yet. I just want a good DL feel like I do with cigs.