As far as i am aware he makes no distinction as to which tariqah is better and which is not, infact he praises the Major known Sufis eselwhere in his work - and he doesn't criticise any specific Tariqahs. He instead repudiates claims made by the Anti-Sufis (in his day and age) that Sufism and Tasawwuf are people of Bid'ah and are out of the Sunnah. I dont think Ibn Taymiyyah touched very much upon it's practcies but if you mean dhikr gatherings and ijtimas of other sorts then yes elsewehere in his Majmu' he does talk about it in his answers to various questions - il see if i find something. To me it is simple, find a Shaykh who is proficient in Shari'ah, i.e. Mufassir, Muhaddith, Faqeeh and be under their tutelage in Tasawwuf be it in any Tariqah. Because those who have knowledge in Deen find a balance in both the external and the internal. WaSalaam