I'm just pointing out it's kind of a flaw to make that assertion, because there's basically no world first that hasn't had Summoner and also usually Bard in it.
World firsts are about who figure out the mechanics quicker and the compositions generally reflect the jobs that are more flexible or bring better utility for blind prog. The DPS check this time around is higher almost certainly because the average expected DPS of the jobs is higher (Just about everyone that wasn't top 5 at the time of Titan has gotten increases), but also "we did normal tuning this time"
Like, you can point out that the world first Tea also had a Black Mage, but it's also Sfia, and I doubt it was his class choice that lead to their huge lead on the world first kill, but I also doubt putting him on any other job would help or hinder them either. Mainly because there's a Summoner for the potential battle raise, and you treat the blam like you do a Sam, Drag, or Ninja.
By contrast, Black Mage is present in the first kill, and the next 24 absent. There is one red mage. There are 25 summoners in the first 25 kills.
Expand this out to 50 and you get 4 black mages, 3 red mages, and 50 summoners.
Compared to E4S, we still see a majority of summoner in its less than desirable state, but you see more Black Mages and Red Mages as well.
Unfortunately they don't seem to be running progress keepers in this tier, maybe because they didn't have time to set up like previous, so it's more arduous to do these checks for Shiva, but it wouldn't surprise me if you saw a similar case of an ultra majority of double caster being Summoner + the other.
TLDR; Get rid of the raise.
If there is a constant to expect in anything regarding summoners, it's me saying that.