Get CurseClient, it's the best tool when it comes to updates.
For dots, get ForteXorcist, you can set it up so you can track your dots on every target. I see you already used it, but open the settings panel and you'll find that specific thing.
TidyPlates, it shows your dots and the time remaining on your enemies. Not much, but hey... it's something good that will help you sometime.
Souldrainer, essential addon for Affliction.
OmniCC - Cooldown text on spells, essential.
And for aesthetics try things like Dominos + Buttonfacade, SexyMap, kgpanels + SLDataText ,Cowtip, Prat.
Satrina Buff Frames - You'll have to configure it, it's easy enough. I'm using this to track things like Power Torrent.