Read up on the Curly Girl method (CG), there is quite a bit in the stickies on this board and the newbies board. Also loads of videos/ curly gurus on YouTube your daughter might engage with, if she has access to a smartphone or tablet she could download the 'Curls on the Go' app which includes the frizz forecast and the Curly Harmony e-book, both are free.
Go Mobile - NaturallyCurly.com
Not free sadly
Curly Girl: The Handbook: Michele Bender, Lorraine Massey, Deborah Chiel: 9780761156789: Amazon.com: Books
Live Curly Live Free - the e-Book
Do you have hard water or does your daughter swim? If yes it would be well worth doing a chelating wash to remove minerals, ION swimmers shampoo or the Malibu C sachets at Sallys are CG friendly. Even if you don't feel you need to chelate do a clarifying wash with a clear non moisturising shampoo. You have been using a lot of silicones (suffix -cone, -conol, -xane) that could have lead to product build up which can cause problems.
After that consider switching to conditioner only washing, it's much gentler on the hair and should make detangling less of a chore. For your regular conditioner look for the behentrimoniums for slip/ detangling, natural oils for frizz control/ detangling, panthenol and possibly hydrolysed protein for patching damage (long hair is always damaged at the ends by normal 'weathering'). Avoid or limit anything that can build up or dry out hair or needs shampoo to remove - most silicones (can still use water soluble ones), drying alcohols, some of the polyquats, butters like shea, mineral oil, petrolatum.
A leave in conditioner should be a creamy type product containing fatty alcohols and cationic surfactants, these help keep the right level of water in the hair, help with clumping the curls together/ frizz taming. Many CG friendly wash out conditioners can also be used as a leave in which saves buying so many products. Use loads of leave in, curly hair can take a lot especially if it is dry or damaged. A spray is only good for refreshing or 'moisturising'.
Ingredients Commonly Found in Hair Care Products
Breakage around the face could be the way it is being styled, curly hair ideally should not be combed other than when soaking wet and slathered in conditioner. Also ponytails and other up dos can cause damage and breakage, be sure the style is loose and whatever you use to secure it is super gentle - terry cotton bands, anything silk or satin, scrunchies not regular elastics even if they are 'no snag'.
To reduce overnight tangles buy a satin or silk pillowcase or satin or silk sleeping cap and wear the hair in a 'pineapple' or loose braid. Does she also need a trim? Damaged ends can snag on healthier hair higher up damaging that.
For styling another good book is 'Strictly Curls', that might help you work with the face framing curls instead of trying to tame them into being flat and straight. You can use dilute conditioner to tame excess flyaways or flaxseed or okra gel which you might enjoy making together?
Strictly Curls: A Step-by-step Guide to Styling Curly Hair: Nicole Siri: 9780976350644: Amazon.com: Books
DIY for Curly Girls - YouTube
Eeep, sorry it's an essay!!