Hi and welcome to the board. If changing the coil in your clearo doesn't help, about your only options to reduce throat hit are to decrease PG in the PG/VG ratio-- that is, a higher VG juice-- and/or to cut nic. The pen you're using is designed for mouth-to-lung. It doesn't really breathe freely enough for direct lung hits. I'm sure you know what I mean; lung hitting it will be like trying to breathe through a drinking straw. Doubtless you'd like a tank with better airflow more. The problem there is, airflow must be balanced with vapor production, or you will feel like you're not getting any vapor, just air (the vapor will still be there, but "swamped" by the airflow and, since you can take a hit faster with better air, you'll be getting less vapor per draw.) To get more vapor to go along with more air, you will have to reduce the coil value from the 2 ohm coils you are using. And the problem with that is your current battery will not safely support much lower coils, so you'd need a new power unit in addition to a new tank with lower coils.
If that's something you'd like to try, the Kanger Subtank is not a bad place to start. It has coils available from 1.8 ohms down to deep subohm and an adjustable air flow to allow you to both balance vapor and air, as well as test different combinations to see what you like best. I am hesitant to recommend subohm vaping to a new vaper. It's pretty powerful. But if you like direct lung, you're going to need to go lower than you are now to be happy with it; 1.2 ohms, perhaps, or down in the .8-.9 range might be good for you. You may not need or like deep subohm under .5 ohms. Or maybe you will like it--I do-- but the only way to know is try.
Which brings me to power. The Subtank I recommend comes bundled in the Subox Kit (among others) with a 50 watt removable battery mod which will handle anything the tank can do except Temp Control. Other power units with fixed batteries would be the iStick 30 (marginal for subohm), the iStick 40TC (better) or the Innokin Cool Fire 4. As an alternative, the Evic VT (fixed battery) or VTC (removable battery) come bundled with a different tank which I don't like as much, but which would also probably do for your purposes. One benefit of going to more powerful gear with lower coils is you will be getting more vapor per hit and it will then be advisable to cut nic in the juice, which will help with the original throat hit problem. Look up some of that stuff and see if any of it recommends itself to you. Then come talk to us some more with your questions.
