Self levelling a floor

Hi guys

Have recently been renovating my house it is on stumps. I am just after some advice on self levelling the floor. I had about 9 stumps replaced but he didn't recommended jacking it up to high as all the tiles in the bathroom I renovated a couple of years ago would have cracked. It is a big job and expensive for me to replace the joists etc so don't want to do that.

I have a timber flooring and decided I was going to tile again and have put fibre cement sheeting over the top but now have decided to do a floating floor as it's more cost effective as well for me.

So basically I'm at the stage where I want to level the floor most of it is pretty good but have a couple of sections in my kitchen and living room that dips about 15mm. Can anyone recommend what I can use to self level the sheeting I have layed is James Hardie underlay.

Hopefully this makes sense to someone would be free to have a chat to someone if you have any advice

Cheers Adam