Is it worth bringing a summoner to raids?

[Ariomi]

It never did. I used to think to myself how nice it was that Lilly would keep higher hp than me, therefore full stats, with old weakness. It was a minor buff for sch prog compensating for the heavy mp cost to re summon after death.

I can tell you for a fact that it did. Back in Creator you could see the hp difference with your pet if you summoned it after you died.