Reusing and reordering tasks

I am currently doing some release planning for a new development project. In every release, I have a set of requirements that will be fulfilled as part of that development. I have then broken down the requirements into tasks i.e. Requirement sign-off, System development, Functional testing, UAT, Pre-implementation checks & Deployment in LIVE. As these tasks will remain the same for all requirements, my question is as below:

- Currently I have to create these tasks for every requirement. I dont have the ability to copy tasks across different requirements as well. 

- Once the tasks have been created, I cant reorder them and it often turns out that I have to delete and recreate them from the scratch if I missed the sequence.

I also thought of using the TEMPLATE spreadsheet if it may be useful; however there is no column in the TASKS sheet template where I can mention my task name.

Please advise.