ODM Directory Sync; combining multiple workflows in multiple directions in one workflow

All,

We are working with ODM Directory Sync and have a question related to this.

we have 2 quit big environments.

part of the users will migrate from domain A to Domain B

part of the users will migrate from domain B to Domain A

the read part of the workflow is quit a time consuming item.

is it possible to do the following steps in this order:

1. read from both AD environments
2. Match Objects from both AD environments
3. create multiple Stage Data sections, all for migrating objects from A to B
4. Write to Domain B
5. create multiple Stage Data sections, all for migrating objects from B to A
6. Write to Domain A

or 

1. read from both AD environments
2. Match Objects from both AD environments
3. create multiple Stage Data sections, all for migrating objects from A to B
4. create multiple Stage Data sections, all for migrating objects from B to A
5. Write to Domain B
6. Write to Domain A

Is this is possible we can do it all in one Workflow and just add separate Stage Data sections in the single workflow.

Thanks in advance