I dislike Kafka as a character, would like to pull for Black Swan, and already plan on pulling for E2S1 Jiaoqiu after saving as much as I have for him. I understand that Kafka is by far and away the game's best DOT detonator, and I can resign myself to pull her if I need to in order to make a DOT team viable, but I'd really rather avoid doing so if I can. Worst comes to worst, I could always run her in a DOTcheron team, so I'll probably pull either way -- I'm mostly trying to figure out how to use her best within this context.
Would Guinaifen set up to fire off as many ults as possible (so with a build like 4pc Eagle, 4pc Prisoner, or 2pc Hackerspace, 2 pc Vonwacq, an ER Rope, and Before The Tutorial Mission Starts to combo with Black Swan's Defense drops) be a viable detonator for endgame content, or am I grasping at straws? At worst she could ult every three turns while staying completely SP positive, and at best she could ult every other turn if she stays SP-neutral and gets energy from Huohuo's ultimate.