If the quality of your gear is fine, you should be perfectly fine with as much as 40-50 mgs per day, and there is absolutely no need for 70 mgs. The additional benefits will be minimal, but the liver will suffer more. Make sure to be using a good liver supporting supplement along with anavar, such as N2guard, and I would personally split it in two dosages if possible. This would provide you with a more stable level of the active substance, and there would be less liver toxicity at any given moment.