Hey, bro.
After 15 days of clomid you should be able to start fine without being too catabolic.
My personal experience after my last cycle is that I was pretty anticatabolic on clen. But when I switched to eca or nyc I lost some gains. I was rotating clen and eca every two weeks, starting same time as clomid.
The clen definitely helped keep me from being too catabolic.
Hope it helps.