Abyssal Demons With The Venator Bow – Ultimate Ironman
Void ranged is better dps than crystal armor. Higher rates are possible with better arrows, full masori, and zaryte vambraces (depending on max hits).
Not very afk because picking up ashes while constantly getting teleported is really annoying, but a fairly low-effort method nonetheless.
Video (on task):
Rates (off-task):