Whatever you do do not help the other chick if its taking a bit longer to hatch. After the first internal pip it can take up to 24 hours for them to externally pip and that can also take up to another 24 hours. You can check under then hen really quickly to check but dont pick up or turn the...
You could probably do a ramp but it most likely would have to be covered or netted over the top and sides otherwise your gonna need some pillows or soft thick material under it so if they fall it would soften impact. The first choice is better but 2nd as a back up
As long as the ramp isnt to steep and has some grip for the chicks to get up they should be alright. Imo I would lock her in the nesting box till they hatch and as long as she has food and water she will be alright like that for a day or 2. It would be best to move her closer to the ground but I...