Our da is 22 months with LI (maybe CIE, who knows). Every kid is different, so really you'll just have to find what works for you. I bathe her every night using exfoliating gloves and Aquaphor baby wash. We have had lots of problems with her scalp, too; the only thing that was working was Sebulex once a week, but it smelled. Now we are using a salicylic acid shampoo twice a week, and putting Curel in her hair before bed. It has really helped the flaking. The rest of the time I just use the Aquaphor wash in her hair as shampoo.
I also use sea salts in her bath a couple of times a week; it really seems to make a difference.
As for lotion, we use Aquaphor twice a day (first thing in the morning, and right after her bath at night) and then I use Vanicream on her through the day as needed. We use Bullfrog suntan lotion, as it is the only one that doesn't dry her out. It also smells like oranges, which I like.
4 year old daughter with CIE