I like boge lr cartomizers, I use them on my ego's and it does drain the battery faster, but no problems so far, also I prefer a 70/30 or 80/20 mix with pg and vg, you'll notice the difference when you vape 100% vg, if you are worried about the low resistance cartomizers and the ego's, just go to mad vapes and get a aa box mod, they are cheap, 8 bucks if you build it yourself(all u need is a glue gun and a soldering iron), or its like 23 bucks if they build it for you, its good to have some redundancy with pv's, and the small aa box mod is are great one to have around, it actually hits a little harder than the ego's, but the ego's are much better with a lr boge IMHO, but they could be bad for the ego battery, i'm not really sure about that, i use the box mod alot more than the ego's.
The boge lr make it so I just carry around the pv, and a small bottle of juice, when the cartomizer gets low I just add a few drops, another tip is if you have 100% pg juice, add some plain vg to it approx 5-10% or so, in my experience it doesnt mess with the flavor too much and I think it smokes better, or you can add some of the pre mixed 100% vg juice to some of the 100% pg juice if you think the flavors would go together.