Work with an auto tagging module

I'd like to construct a workflow that allows nodes either created by a user or created via automation to be processed as follows:

1) automatically scan node content and apply tags
2) resolve tag synonyms appropriately
3) apply parent terms to the node

I'm currently using MO_Auto Add Terms (http://www.m2osw.com/en/drupal.html#mo_autoaddterms) to do step 1, and Unitag to do steps 2 & 3. However, it looks like Unitag only works on user created nodes. Would it be possible for Unitag and MO_auto add terms to work together on nodes--processing some number during a cron job?

Of course, autotag would be also be a good module to integrate with, but I don't think it addresses a scenario in which nodes are created via automation. -- In my situation, various nodes are created via email.