Hello HightowerMcD
I don't think it is possible to push emails from Campaign to other platform as the data flow in campaign is through xml and not sure how the other platform is designed or even compatiable with the templates created in campaign. Though we have routing external accounts to configure on campaign side to send deliveries through external routings , not sure if that works for emails.
Also we cannot send notifications withough providing a template, you have to create a template in campaign but you can personalize the delivery with target data. You may not send complete html usin target data but you can have conditional content designed in campaign which can be rendered based on target data. For example you can use a switch or if clause in jsp(java server pages) to present the proper content based on age of a recipient, or any personalization data.
Templates are available via API to send emails but you can't see the content in the template by making a get call. Not sure how exactly the other platform is storing them, Depending on the users you use, you can publish, make changes to the templates but not to the html content.
Thanks!