egoc-twist is essentially a mod. It's a variable voltage mod. If you are happy with it, there would be really no need to change. If you want a more advanced mod like a provari or a dna type regulated mod, the only advantage would be to have the ability to go lower ohms on your coils (1.0 or less). If you want unregulated then you go with mechanical (unregulated) but then you need to know ohms law really good so you don't blow the battery in your face.
I have a a dna 30 (Hana) that I would use all the time. What I really liked about it is I could charge it with a mirco-usb cable so i would have to bring my battery charger with me to work all the time.
What kind of juice are you vaping? I find darker liquids are a little more prone to being cloggy. That are you aren't vaping at a high enough level, and the coils are getting clogged quicker.
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