It's funny, I think I build much the same as you, and I've had no juicy or condensation issues with the Hastur Mini at all. I do get the odd dry hit, which I suspect is because I draw for longer, and I did find it better when I thinned the end of the wicks slightly.It may have something to do with vaping styles ..... I vape with I guess not a lot of vapour production, if you are creating more vapour than that little chamber and narrow chimney can handle with either a bigger coil/more power or whatever that may cause problems?
I'm not sure to be honest, some shit just doesn't work for people and I'm often at a loss why. There's too many variables to figure it out I think.
Do other people notice any difference between the airflow holes with this tank? Mine seems to leak a fair bit of air in at the airflow ring. I can even put my finger right over the hole and still get a puff out of it. I might change the o ring(s?).