Nothing magic about drippers or juice.
A lot of people build low ohm duals for their drippers and the increased efficiency produces more vapor. More vapor per draw means you can/should back off on the nic to get the same experience (TH and so forth). Temperature also plays a role - the hotter the vape, the more TH you're likely to experience - as does how you inhale (mouth2lung versus direct lung) and air flow. These so called "cloud chasing" variables are behind why so many people who drip reduce their nic - they're getting a wallop more vapor per inhale.
Other folks use single coils at ~1.5ohms in their drippers and aren't producing more vapor or temperature (than, say, a nautilus with BVC at 15-20 watts). They don't feel the need to downsize the nic.
Soooo... the net of this is that the juice that will work for you is driven more by the build and vaping style than the dripper itself. A lot of people treat all dripping the same when it's actually the widest range of different vaping experience possible. Given that you have a 1.8ohm single coil driven at not-obscene power levels, you shouldn't be experiencing a drastic need to lower the nic. If it's harsh, there just might be issues with hot legs or wicking (dry hits). That said, lower the nic by all means - try half of what you normally vape to see how it feels. If you can get away with less nic, this would be a bonus, no?