Pages on iOS custom paragraph styles & templates?
You can create a symlink of the actual pages template directory on your Mac in your Dropbox so that you don't have to maintain two copies of your templates, and then use Dropbox to open the template files in Pages to make a new doc based on the template. 

Though template files are saved as .template, Pages for iOS still opens them correctly. You can create the symlink with the following command:

ln -s ~/Library/Application\ Support/iWork/Pages/Templates/My\ Templates/ ~/Dropbox/Pages\ Templates