I'm not a big fan of AIO (all in one) vape setups, but I guess they have their place. Not a fan of SMOK products, either (inconsistant quality control from one item to another). The Innokin Pocket Box and SMOK 22 have only 2 ml capacity tanks.
I'd seriously look at the Innokin Kroma/Zenith kit that Letitia suggested. The Zenith tank has twice the liquid capacity of the Pocket Box or SMOK 22.