Re: Kitchen, Diningroom Floor.
What condition is the chipboard in? Is there any deflection (bounce)?
Your suggestion seems fine, just remember to continue an expansion joint from where the 2 substrates meet directly up through the tiling.
Here's a couple of other suggestions for you to consider....
1. Why not replace the chipboard with 18 / 22mm wbp plywood? This will give you the opportunity to add extra noggins to the floor and maintain the same floor height as the existing screed.
2. If there is no deflection in the chipboard floor, you could glue and screw 6mm cement boards to the chipboards. This means that you will have a stable and tileable substrate and will only use half as much slc to bring the screed height level.
Whichever option you choose to go with, you will have to incorporate an expansion joint so that will be your main restriction, IMO.
Good luck,
Daz