Lesson batch size - many small batches or a few large batches?

I tend to do three batches of 4 items. And I keep randomizing the batches until it has 1-2 kanji and 2-3 vocab at a time. I find it much more enjoyable than doing all the kanji together, since as you said that can be too much information.

One nice thing about my Lesson Filter script is that you can change the item type distribution and batch size on the fly, without going to your settings. For example, if you wanted to do a batch of 3 kanji and then a batch of 10 vocab, you could do all that from within the script.