Alright, Which dreamers from the forgotten shore would have become completely broken if they didn't die?
At number 4, I have Gemma. He had an almost instantaneous healing factor, even caster, with his fast cuts would heal before the next one.
The possibilities are just insane, he would probably be recovering from kinds of attacks when he ascends, soul and mind.
At number 3, I have an unnamed sleeper who could sense the general location of anyone's position as long as you met them. This is already broken, I feel like at higher Ranks she would achieve something like the Door beyonders from lord of the mystries, Positioning, where she can locate anyone and maybe even attack you from anywhere as long as she has something connected to you.
At number 2, I have Harus, yeah he was already overpowered as a sleeper. Suppressing vision immediately and he's physical hax weren't a joke either, he was just ripping out people's arms like pieces of paper.
At higher Ranks i think his supression would evolve to not only vision but all senses and even abilities.
At number 1, I have caster. Any power dealing with speed its limitations really becomes your imagination. At higher Ranks save and time will literally slow around him, attacks won't matter when they can't even reach him. And this is just obvious evolution so yeah he had to die, if he became an ascended or transcendent antagonist he would have been up there with mordret.