What is the difficulty level of the JEE paper set by IIT Roorkee? Which subjects can be expected to come tough and easy?

I had the opportunity to ask a professor about the setting of the JEE paper. The answer he gave me has been summed up below:

• The question paper is not set by a single IIT rather it is a joint process with the contribution of every IIT.
• The organizing institute forms a team of professors who are highly experienced in their respective fields.
• The entire team is made to stay at a single place for some days.
• All the professors are required to assemble in a single room and everything they ask for is provided.
• The professors are made to stay for a week and whenever any professor comes up with a question they go to the common room which is highly secured and then jot down the question.
• The entire process is repeated several times and the finalized physics, chemistry, and math papers are given to the leader of the organizing institute who later decides which set to go for.

The setting and pattern of JEE paper are highly unpredictable as it is the joint work of many professors. The last time IIT Roorkee set the paper, there was a lot of logical reasoning and assertions, but still, no one can be sure.