all of them ;) but really depends on your weakpoints... that is more of a subjective request so hard to answer. If just starting out though I would say the grammar lessons are great bc it really helped me separate the different parts of the stimulus
@jaredj229 on your LSAC account you choose which letters you want to assign to which applications. Also, when submitting the request electronically to your recommenders, you can label each of them in order to keep track of which letter is which
I'm pretty sure some of the schools on the no list will still do it if you ask them, they just don't advertise it... An email request never hurt anyone...