As-salamu Žalaykum, It is permissible to follow different Imams on different issues according to the Shafi'i school as per the words of Al-Imam Ibn Hajar Al-Haytami, rahmatuLlahi Žalayh. The question only arises when it comes to following different Imams in relation to the same action. But there is agreement that it is ok to follow Imam Shafi'i in Salah and Imam Malik in Fasting for example. But it is impermissible to seek out dispensations just for the sake of leniency, for that amounts to following ones nafs and making a game of the Deen. waLlahu a'lam wassalam