Can someone give me an in-depth explanation why Summoner is arguably the worst DPS?

[Dyvid]

Snip

So what is needed? MP or DPS buff? Which would make the biggest impact in SMN DPS? People aren't against buffs that help SMN in FCoB. We are against the claim that SMN is just a poor DPS all around and worthless in all forms of content. Sorry but that just isn't true.