Personally I believe that the deepest trance is what affords the greatest development in pathworking. Deep Trance allows boosting of the immune system, healing of the body , restoration of peace, and much more than this. Deep Trance affords ascension through energy initiations, attunements, mystic visions, mystic projections and through the lessons of the Mahatma which can not be met except in altered states of consciousness such as is best afforded through Deep Trance.

To attain a deep trance the mystic must prime the energy body by drawing energy through it. I find that drawing energy downwards from crown to toes and following this with an upward flow from feet to crown instantly affords trance . That is if it is done in the prepared sacred chamber. It is possible to do just as well while sitting in a car or waiting in a doctor's office but it is best to create the optimal atmosphere and this occurs in a prepared sacred chamber. The space should be clean , uncluttered and closed in to create a place where the energy rolls within and is self contained so it builds up. The asana or pose of the mystic should be comfortable enough that it can be sustained for 30 minutes or more. And the spine should be able to carry the energy through it so crossing limbs or contorting the spine will impair trancing.

I suggest to you the works of Diana Cooper A Little Book on Ascension and Dr. Joshua David Stone 's many works on ascension methods through trance meditation.
Here are some links;
http://www.astraldynamics.com.au/sho...t=throne+asana
http://www.astraldynamics.com.au/sho...sacred+chamber
http://www.astraldynamics.com.au/sho...sacred+chamber
http://www.astraldynamics.com.au/sho...sacred+chamber