I guess it depends on what you are trying to extract from what
For smells and taste I like cold extractions best.
Didnt say anything about dry ice, but that would certainly be useful to quick freeze the plant material and crush it, more surface area is always good. I usually keep the ethanol around 18f, it still works as a solvent and you can filter out any excess water crystals when you are done if everything is kept below 30.
This method works well for cannabinoid extraction, which is what we were often working with, just fyi