My ACT composite score is a 34, but I just got my writing score in and it is an 8 
. Should I take again, I dont’t know if it would be possible but I would really like to go somewhere like MIT or an Ivy League score?
8 is fine. Done and dusted.
Writing isnt gonna make or break you. An 8 is fine. Since you mentioned MIT I would assume your going into math or science; therefore, writing will mean even less to your admissions officers.
8 is not a problem. Don’t retake. Colleges don’t emphasize the writing score and 8 is above average. You are done.