I don't actually think you can full attack with your touch. If you could the demi-lich entry would have listed multiple touches as it's means of attack. While you can full round attack with touches most touches take a standard action to charge (and the touch is part of the casting). Spells that allow multiple touches (chill touch) allow such options on subsequent rounds.<br/><br/>If you can somehow quicken it though then you can full round with it.