I can handle one summoner in a party, but if two or more are going, I have to drop. They just bring so much obnoxious visual clutter. It's like watching a Vermilion Scourge every thirty seconds.

Granted, a lot of jobs feel excessively flashy these days. Reaper doesn't really need giant swathes of color with every swing, for example, and I've complained about machinist's Heated shots more times than I care to recall. But summoners are actively painful to play around.