Honestly Summoner can remain at the bottom. It belongs there simply by virtue of being better utility than all of the ranged DPS while being easier to play and less ping reliant than Machinist. Yes you can play around Phoenix’s HoT, believe it or not. Red Mage by contrast has more mobility/positioning concerns and has significantly more hardcasts. We are at a point where dps AoE healing CD stacking can obsolete healers entirely, so the Phoenix vs Magic Barrier discussion should err more on taxing the former, simply to keep that specific abuse case down. I’m not sure how much the new Acceleration changes has improved Red Mage but I’m certain it’s significant given how far Egi Assaults and Further Ruin went on Summoner in ShB.

Even so, Summoner IS that easy. There’s no excuse not to keep it down. I’d rather see Red Mage buffs if I’m being honest, but there are bigger issues than catering to the caster role at the moment. It’s one of the few things that makes sense at the moment.