Supposedly OmniFocus can be set to automatically import from Reminders (for the purpose of using Siri).
This gives you another couple of options.
Drafts has two built-in actions for Reminders: send a single reminder or send a list of reminders to a new or existing list. In both cases this happens while staying in Drafts without launching Reminders. Then if these Reminders do get imported into OmniFocus (and it sounds like this is possible) it could be a quick way to send an item, or a batch of items.
Sending a list in Drafts is simple, each line becomes a reminder in Reminders, sent to the default list. (Set your default list in the Reminders settings in the iPhone's Settings.) if the first line begins with @, !, or #, the first line is used as the list name. If the list does not exist it is created in Reminders.