How to decide on choosing face or astrology reading or divination  at time of  doubt on destiny?
Great chinese metaphysic master Wei Qian Li (1911-1988 ) had written his opinion and suggestion in his book titled "Brief Talk about Destiny", and now extracted below for sharing:
Chinese astrology (eg. Bazi, zi wei dou shu)  could read a person's entire life for overall luck in good or bad.
Face reading could disclose a person's ad-hoc, next near moment luck or bad incident sooner to happen. 
Therefore, if wish to know a person's future for overall luck,  chinese astrology reading would be most appropiate.
If wish to know the recent and next moment luck,  face reading might be able to expore some amazing signs and message for so. 
If  come across doubts and hesitations at upfront decision to make on  various options,  choices, opportunity for a specific event or activity, the divination (eg. using I-ching, ) would enable an immediate direction for decision.
All these chinese metaphysic methodology seem having similar objective for forecasting the future, their nature of applicaion for usages are not the same.
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如何選擇應去找 看相? 批命? 占卜?
近代盛名命理大師 韋千里先生 在其蓍作 《命運談屑 》 有以下可参考:
命定一世榮枯,相觀臨時禍福,佔卜乃決疑難,解決局部事宜。
所以欲知前途如何,批命最宜,欲知近期動態,睇相最妙,如有疑難之事,佔卜則立可決策,性質皆屬預言,效用卻非一致。