Cricket/Saddle Problem?

[lgswe]

I have a area on the roof of this addition with three different roof pitches. I would like to close the open area in with a roof plane attached it to the three pitches to avoid snow and ice build up and good water run off. As you can see from the attachment all three sides are at different angles and none are horzional. I've tried different approches but so far nothing has worked. I can get a manual roof plane to attach to two of the roof planes but not all three. I hope that from the attachment and what I've mentioned above you will understand what my problem is and what I'm trying to do. I'm using 10.8 Thank you.
Larry