Hello, several things :
The juice you made is 1g/5ml, which is quite weak (compared to your expectations) even for a subohm tank, unless you boost the watts in a way that would lead to more harshness in the throat/lungs, maybe more toxic PG by-products and higher risk to quickly burn the precious spice and darken the juice quickly. So first step for your next juice being more efficient, go for 1g/2,5ml ratio. That's my usual concentration for subohm tanks and versatile use. Keep the (relative) low wattage you use and adjust other parameters.
Among them, an important one which is often underrated is the inhalation pace and for some people it can be somewhat counterintuitive : the slower you inhale, the stronger the effects. Slower inhalation will produce a more dense aerosol and also, it will heat the coil more, like when you increase the watts (hence the need to keep your wattage in a decent range if you want to preserve your juice and coil). Actually, the inhalation pace (or inhalation tension said in other words) is the last step for modulating the effects intensity. If you inhale tensely, the effects will be weak (lower coil temperature, less dense aerosol). If you inhale slowly, effects will be stronger. Adjust your inhalation tension according to your will with the spice. Some practice might be needed to master the thing.
The question about "how much deezy would one expect" per puff is not easy to answer. I think it can be determined by calculation, taking into account the juice concentration and the remaining juice amount (or weight) which changed after the puff. The result will depend on the several parameters mentioned here. And remains, at the end, related to your inhalation pace, but also the watts you set and the juice ratios. These last two are static (unless you change wattage at each puff), while the inhalation pace may vary, including within the same puff.