Ultimate Magus and Practiced Spellcaster

A Q/A proposes Practiced Spellcaster to keep increasing the more valuable (Wizard) class.

Practiced Spellcaster increases CL by 4, up to the character level.
Ultimate Magus increases CL on levels 1, 4, 7 and 10, without any such limitation.

Can I count Practiced Spellcaster first, to reach my class level, then increase it by four, or is the feat completely wasted, is the difference between my CL and character level less than 4?