I consistently used a step 1 anki deck (basically that old slyfaux deck that used to go around...pretty much FA turned into a deck) throughout 2nd year. I started slow and ramped up as time went on, roughly only 10-12 new cards per day in the early fall, probably about 20 by early winter, and 30-40 per day by the spring. The deck was about 7000 cards and I had finished all new ones by may. I always did all my reviews, like I didn't cap it at all. Doing this I was still able to make very good grades on my block exams and my first diagnostic NBME in january was at a 220, well into the 240s before dedicated period. So, I felt it prepared me very well and it didn't prevent me from excelling in class. Oh and I would ramp up new cards per day during holidays, so over winter break I probably did like 40 - 50 new cards per day.