In my experience, no.
What I have had good results with the Stick Wax Burner pen. This is a bit of a different design to the ones that you have been using and it works very well for the thick and sludgy wax that I make.
As well, I have been experimenting with Kanger cartomizers (the horizontal coil ones). All you need to do is pull the foamy nylon out and you have pretty much the same design as an omicron cart without the blocking problem. I have not used them long term though so I don't know how they hold up.