My role-playing etiquette

[Shulk]

One challenge I've had with writing Shulk is his visions. Because of the tedious way edits work, I want to double or quadruple check with people in a thread before I essentially write their character's death. Even though the whole gimmick is "this won't happen because teamwork," one slip up would ruin the moment because what happened in the vision didn't happen. I.E. Volvagia doesn't attack because we didn't get him as an NPC.

That, and I'm generally antsy about writing the dialogue of characters I don't know, and I'm worried that if I'm not clear enough I'd get accused of godmodding. Bit of a stressful power to write, all things considered.