TTFB & Page speed issue

[thesparklingwedding@gmail.com]

Activated Cloudflare for all domains. But effective CDN is giving X to all my domains if i choose test location Mumbai,India But its working for other asian countries like singapore

advertisingphotography.in

Singapore : https://www.webpagetest.org/result/170521_XX_FJY/

Mumbai : https://www.webpagetest.org/result/170521_0P_FRF/ thesparklingwedding.com

Singapore : https://www.webpagetest.org/result/170521_E2_FWC/

Mumbai : https://www.webpagetest.org/result/170521_R2_G1G/

I have included test report for two domains but all domains are giving this results CDN properly not working for india and all my sites become slow suddenly

Google page speed checker is showing me reduce server response time but i can tfind out the issue behind this.I am using sitegrounds go greek hosting

For testing server speed i have installed a basic theme and optimised that site to test the server response time but i am getting F in TTFB and google page speed is asking me to reduce server response time.

How can i reduce server response time this a biggest issue for me right now. please help