I don't want to sound mean, but I noticed that all the people that are recommending the ego-c, are kinda using it as their first e-cig. If you're on the V2, you already know the drawbacks of entry level e-cigs...I just think you should step up to the next level, the Ego-C, would kinda be just a slight veer to the left... If you want a steady hit, I'd probably get something along the lines of:
-2 1000mah 3.7 batteries
-a j-tank
-some LR boge cartomizers
-a saddle valve to punch your cartos
You can use just straight up carto when you're on the go, and want something sleek, and the j-tank will extend the life of your cartos, and let you vape hassle free all day.
I think that set-up has all the glamorous points of the ego-t or c system, with a lot less hassle and much better vape