i am in the same boat as you. i have read countless posts on this issue. i have concluded that there is no general consensus on this issue. some swear by schweser and say that cfai is too inefficient. some say that cfai is absloute must and schweser is rubbish.
I think the truth lies somewhere in between and there are advantages and disadvantages of both. an optimal solution may be to use cfai on readings and study sessions where schweser is poor and use schweser for rest. now which those readings and study sessions are, i do not know. someone else may have to answer that question. in any case doing cfai eoc and blue box question is well advised by all. also doing cfai mock, sample and past exams as well as schweser practice exams.