Update: Rift 1.6.1 Hotfix 10

GENERAL

 * Added some optimizations that should help with the recent server/ability lag issues.

Source
http://forums.riftgame.com/official-rift-news/patch-notes/294922-rift-1-6-1-hotfix-10-10-30am-pst-1-26-12-na-2-00am-gmt-27-1-12-eu.html