In sentences like this:
"The parenthetical phrase is a great example of using an interrupter to great effect for foming a clear idea."
Is it imperative to change it to this with double commas?
"The parethetical phrase is a great example of using an interrupter, to a great effect, for forming a clear idea."
The reason I am asking this is because I am not entirely sure if I can leave my sentence like this, since most of the people would write "The... interrupter for forming an idea to a great effect."
Please tell me if it is ok without double commas. Also, please provide me with parethetical phrases with double commas that start with word "to" if possible. Thank you.