Yes, the order of exams given are more or less the correct order in terms of difficulty. However this doesn't mean that the preparation is same for all.
Take the time to check syllabus and exam pattern for each and you will understand how to tweak your preparation. For example, you will focus on certain topics for CLAT vs some other topics for SLAT, MH-CET.
The AILET is known to be easier for students who are stronger in English - language skills help both in Comprehension and Legal Reasoning. The AILET paper since it's inception has been very predictable when compared to the CLAT exam which is known to be unpredictable in terms of paper pattern and level of difficulty.
This year the CLAT pattern is english language heavy with a focus on evaluating the comprehension and reasoning skills and abilities of candidates.
MH-CET is not a difficult paper (there are no samples or old question papers available except memory based ones) but can get lengthy. The SET is relatively easier and you get plenty of time to solve the paper (2.5hrs).
IPUCET, BLAT and DU are all similar to SLAT.
LSAT -India is a English heavy exam but because it's a multiple choice style of questioning, a number of students get lucky by scoring the cut-off at 55 marks. If the paper was to include negative marking for wrong answers we would have relatively better quality of students getting through the LSAT-India.
I like this question because it enumerates all the law entrance exams in India! All the best!