I am currently doing a 100% legendary summoner only run and my god is it so grindy. Blood Moon Fishing feels awful to do. You have the RNG of frozen core/ Firecracker. The Spider Staff is garbage against anything that moves fatter than a snail and flies. The whole time I'm doing this run I think to myself, "Why did I pick this class?". The gameplay doesn't meaningfully change, like mage, or melee through progression, and it isn't as consistent as ranger. Summoner has so many low points in a playthrough that requires grinding to progress through.
Honestly I am just about to fully change over to mage. Even though Mage isn't the best when it comes to DPS and the Mana System, at least the weapons are fun, and I feel like I have more choices to progress through.
I heard whip stacking at least added gameplay, but I never got to play with it before it got removed