The chicks will all be pearl since both parents are pearl. Other mutations will depend on the splits. It looks like Loki is cinnamon and Rocko is not. Cinnamon is a sex-linked gene with complicated inheritance rules. She'll give the cinnamon gene to all of her sons but not to her daughters, but you won't get any visual cinnamon chicks unless Rocko is split to it. Isn't Rocko pied or split pied? If he's visual pied he'll give the gene to all the babies and if he's split he'll give it to some of them. But they'll have to get the gene from Loki too to be visual pied.
Cockatiels prefer to feed soft foods to the chicks because it's easier for them to digest. I think your birds are eating a lot of soft food already, but if you think you could make improvements then start working on it now. Pellets count as a soft food because they get mushy when the parent bird eats them and drinks water. If you can find a "high potency" pellet (sometimes called a breeder pellet), it will provide higher levels of all the nutrients.
When my birds are breeding I give them a little bit of cooked egg every day. Egg food is really more for birds that eat a lot of insects in the wild (eggs and bugs are both animal protein so the nutritional values are kind of similar). It's OK for cockatiels to have a little bit of egg in the diet but they're not known to eat a lot of bugs so it's not natural for them to have too much egg. A more natural way to provide protein is with the seeds plus beans combination, and you already give them lentil sprouts which count as a bean.
You can change seeds from a hard food to a soft food by soaking or lightly sprouting them. I have an article about how to do it here:
http://www.littlefeatheredbuddies.com/i ... uting.html You can buy some dry lentils and soak them along with the seeds/grains so it's all part of the same mix. Some beans have to be cooked to get rid of toxins so not all of them are safe with sprouting alone, but the article tells you which ones are OK.
Good-quality whole grain bread is also a good baby food. Nutritionally it's fairly similar to seeds, so the parents need other types of food in the diet to provide the nutrients that you can't get in seeds.