I can't believe me of all people is about to say this, but since you use an NEBOX for out and about, you may want to consider a high-powered pod device for out and about use. But I'm not the person to suggest any of those. Three are so many of them and I own none of them.
Anyway, unless your device is failing or something, it won't do you any good to change it. That's not causing your problem.
However I can tell you that higher ohm SSOCC coils from Kanger are getting rare. Unless you have the means to hoard whatever you can find, it might be in your best interest to fin another device. But to be honest, the vape industry has a big problem where we have thousands of devices and new one come out all the time. This means coil heads get discontinued quickly. Those Kanger SSOCC and OCC coils have been around for a long time. But becoming harder to find now. There are few coil heads in this industry that have been around for years and years.
That's why I became a hoarder early in my vaping life. When I saw that all this new stuff comes out every other month, I didn't want to be left high and dry having to buy new stuff all the time.
Surprised you have an NEBOX . That's impressive.
However, for the home mod at least, I suggest you getting yourself that has a replaceable 18650 or 21700 battery. Personally, I highly recommend a Eleaf Pico. They are durable mods for me. They are smaller than your NEBOX. But these are not AOIs like the NEBOX so you have to use a tank on them.