Ritualist/Mesmer
Inspiration Magic: 9
Restoration Magic: 9+1
Channeling Magic: 12+1+3
Caretaker's Charge [E]
Renewing Surge
Channeled Strike
Spirit Rift
Generous Was Tsungrai
Auspicious Incantation
Channeling
Rez Signet/Flesh of my Flesh
Code:
AYNyQGmi8AtNuJTHHBT0ZCEA (Copy and Paste that code into a new .txt file and place it in your Guild Wars\Templates\Skills folder, then you will be able to load the build )
The idea is to keep up Tsungrai's ashes and spam away with Cartaker's, Renewing and Channeled Strike. Channeling and Caretaker's Charge are your energy management (7 energy +1 for each foe around you is nice) seeing how in Nightfall you almost always end up being mobbed at close range anyway, also Auspicious Incantation and Renewing Surge is an excellent combo (while holding ashes of course).
With Spirit Rift you can pull your own solo spikes if you can find a nice stationary target, cast Rift on them then follow up with Channeled Strike for a nice amount of solo damage.
Enjoy.