No single extraction technique is suitable for extraction. Many factors comes to play. The nature of plant, phytochemical of interests, extraction solvents etc. Generally, I will suggest cold extraction methods to avoid the loss of volatile components.
Also I invite you to our collaborative book project on phytochemistry.
Thank you Chukwuebuka Egbuna and Milan Hait for your valuable suggestions... I am going to extract first with cold solvent extaction technique then I will try others.