The problem with the Summoner is a combination of content and Job design. Summoner lacks in key areas needed to be an effective DPS in challenging and hardcore end game content. Summoners lack in sustained damage, single target damage, bursts damage and AoE damage. DoT classes make great bubble healers but poor DPS. Towards the end of 2.4 Summoner's disappeared I'm on the Leviathan server and I don't see any Summoners by now SE has to realize that the job is inherently broken and should overhaul it.