Talk:What is it all for?/@comment-212.95.7.69-20170224111810/@comment-26336582-20170224122005

7 levels of Watchful at your range are 490 CP.

It's safe to assume that it's a constant number of CP. However, starting with level 70 the number of CP per level doesn't scale anymore but stays at 70. So it doesn't matter when you do it, it'll always be 500 CP (or 490 if you are absolutely certain).