I think this would make slayer better so people can train slayer and hunt for a black mask at the same time, instead of camping there off task.
I see what you mean, but technically you’d still be fighting them without a slayer helm while trying to go for a blask mask, right? Based on how you’re explaining your point, the only benefit I would see is the slayer experience. I’m sure that ironmen with a slayer helm already would avoid doing this task, and besides, there are better tasks to do for seeds such as Kurasks, Spectres, and Turoths.