I think spending a set time in intense practice does lead to meditative bliss, as I never had so many experiences until Tendai gyo, even cleaning a porch or doing prostrations led to it. But at the same time the obsessive regimentation and the overdoing things which led to knee and back injuries, and in my case vomiting and fainting is counter-productive and just plain sadistic. Various people also have different issues, so the one size fits all of training is not helpful. I know priests who told me they thought of food, morning, noon and night, you can look 'perfect' on the outside but your mind is doing a whole other something else. My way of dealing with the pressure was to make jokes and smoke an illicit cigarette behind the chicken coop. But I miss going to a temple and devoting myself to the dharma: lectures, chanting, mikkyo, various meditation techniques - now that the time I spent totally devoted to attaining liberation was amazing.
Dharani of Amoghapasa Avalokitesvara:
Om amogha-padma-pasa-krodhakarsaya praveshaya maha-pashupati-yama-varuna-kuvera
brahma-vesa-dhara padma-kula-samayan hum hum
heart mantra: Om amogha vijaya hum phat