Yes, simple and easy is always better on you and trying to find all the same different feeds now can be very hard with shelves not always full of what you want or need.
That mixed half and half is a 24% protein as long as it meets other requirements that's ok, but you are still buying different feeds and taking time to mix when you could simplify and just use one. At that age just the 20% would work also. I feed 28% starter for only first 12 weeks others only...
As @R2elk elk has stated they are adults at that age and don't need as high protein%. Looks like you have other poultry as well and an all flock is a good all-around feed for mixed flocks with oyster shells on the side for laying birds. And you don't need to buy 2 or 3 different feeds.
#1 and #2 at almost 2 years old are hens. #3 and the 3 in #4 without knowing age and better pics I couldn't tell you for sure but all look to be hens. Are they at least 6 months of age how long have you had them? #3 and #4 look to be smaller younger birds but can't tell from pics.