Quote Originally Posted by silentstack View Post
You're talking in exaggerations. Given your dots and the possible use of Ruin II you can keep up most of your DPS - for a short amount of time due to mana-constraints - while being exceedingly mobile.
Black Mages have infinite Mana and since the Buff they now excel at both single target and aoe burst damage while the Summoner is in the middle of the pack at best. The Summoner got silently nerfed in 2.2 while the Black Mage and other dps classes got buffed.