I think we need to be more in prayer, as Modi has such a strong anti-Christian agenda. I pray for the ministries in rural areas and the Christians working at the grassroots of the country. If Modi enacts his bigoted and facist laws like anti-conversion, it would be so much of oppression for them.
Not to mention, how he might give a free reign to all those hateful parties like RSS etc.
I am going to link to Godsmyhelp's blog post. It spells out what we might have to deal with.
http://christianchat.com/blogs/godsmyhelp/4176-pls-all-my-indian-christian-brethren.html
But I know our God is greater. He is greater than any human being and all creation. He is our defender and strong fortress. I pray that , especially in these times God would use all of us mightily and may we be a light in this darkness.
All glory and honour be to Him.