My apologies for this delayed article. I have tried to put in some strategy ( at the end ) over how we should proceed now.
Summing it up.
#1 Prelims = 5 months of dedicated preparation; those who have done, good , those who started late, follow through Prelims.
#2 If you are good at Prelims, go ahead with Mains Prep. If not, or you have to give at least 1.5 months more than competitors for prelims. That 1.5months can be now ( by which I mean May - June - July 15 ) or just before Prelims ( by which I mean go for Mains, and come back to prelims in July end )