The lower you keep the amps (i.e., the current that burns out attys), the harder you can drive your atomizers.
These days, LR atomizers are extremely popular ... and they do deliver high watts (i.e., power or vape intensity), but they
also create high current. For example, a 1.5 ohm LR atty on a 3.4V eGO creates 7.7 watts (i.e., "sweet spot" intensity) and
2.3 amps (i.e., high current).
The best way to get a very intense vape with
low amps is with an HV (actually high resistance) atomizer on a high voltage mod.
For example, most HV atomizers are 4.5 ohms resistance and are intended for use on 6V mods (using two 3.0V batteries). This results in 8 watts of vaping (very nice) and only 1.3 amps current. [The 5.2 ohm HR attys, intended for 7.4V mods (using two 3.7V batteries), yield 10.5 watts (too high for me, but might be good for you) and 1.4 amps.]
On your 5V box mod, you might want to use a 3.5 ohm atomizer: either a
3.5 ohm "HV" 510 (or
306) or a regular old 801. Either will yield 7 watts and 1.4 amps.
If you are curious about the Ohms Law formulae behind all this, check out
this article.