Hello,
since open source is all about choice, I've created a package for Deluge.
About
Deluge is an excellent BitTorrent client with a client-server model so you can control it either through the included web-interface or through a desktop application that connects to the daemon running on your NAS. It's also design to be lightweight.
More information regarding Deluge can be found on the about page.
Configuration
The default login password for the Web-UI is: deluge
I have also enabled by default remote connections to the the daemon port on 58846 with the following details:
Username: admin
Password: admin
A desktop client can be used to connect to the Deluge server running on the NAS by going into Preferences -> Interface and disabling Classic Mode. After restarting the client you can Add a new connection in the Connection Manager. Use hostname/ip of the NAS and the username and password provided above. Connect and enjoy!
If you prefer to not allow remote connections it can be disabled in the Web-UI. You can also manage your entire Deluge configuration in the admin-users home-directory. (Full path: /volume1/home/admin/.config/deluge). From the ASUSTOR file-manager that would be .config/deluge.
Status
More information can be found at the github project page (deluge-apkg). Feel free to report any possible issues there as well.
Download
Current version: 1.3.11
Deluge APK releases on GitHub
I hope you enjoy,
Mathias