if you're playing yuumi, dont jump to your ally if a targeted ability is heading towards you.
was playing brand against a yuumi and i would just press R on her and she jumped to her caitlyn.
welp caitlyn ended up getting nuked to oblivion every time.
i don't know what other abilities can fuck over teammates if she brings it to them but brand ult definitely wreck's yuumi's teammates if she jumps to them.