Submodels and Laminate Optimization

I'm trying to do a model to make a laminate optimization, but I need to use submodels because in most loadsteps I use one type of elements, and for only one loadstep I change to a rigid (it's for the spring / dumper of the suspension of a formula student car). 

My problem is that I wanted to use the objective of minimizing the weighted compliance in my optimization, but as I'm using submodels, I can´t. Also, I wanted to use the responde mass in the property of my laminate, but I can't too, even though in the error it says that I only can use responses that resort to property (or materials), that it's what I'm using for the response mass - the property of the laminate.

How can I solve this problem? If I can´t use weighted compliance, what is the best option? And how can I use the response mass?