I do have access to lots thick sticky dark ISO oil made from the best BC bud. Is the Persei the best product for this..eh?
My experience with such concentrates in Omicron carts (either with Persei or Omicron) is not positive. Those that don't leak or plug chronically (both common) foul out quickly (deposits coat the evaporation heater slowing production and giving a burnt taste).
Some of the future offerings from D9 might change this, but for now I can't recommend them for these concentrates.
Instead, I'd recommend your looking into the TV DART. Not having wicks to feed seems to help it deal with less than ideal concentrates. When it does foul out, a soak in ISO or boil in water (or both) will quickly put it back in service. You do have to load it more often, I add about 1/20 gram every 6 to 10 hits I'd estimate.
In the end how harsh it is depends on what you put in, but the process itself is easy enough to control and should give you no issues.
Good luck in your quest, IMO it's worth sorting out.
OF