Every coin has two sides, everything has pros and cons.

There may be two aims in simple extraction without additional purification - high purity or high gain. The first calls for many shorter pulls by more selective solvent (naptha or even heptane), the latter for few long heated pulls with less selective solvent (toluene, xylene)

If you are after high gain and high purity within one extraction, I suggest initial extraction by toluene/xylene and then mini-A/B with heptane re-X. This will result in two fractions - white and orange. Both are very potent though. This strategy assures you get the most out of the bark.

Second strategy might be doing first pulls by cold naptha and latter pulls with heated naptha. Separate precipitation yields vairous products.