Hours required in the same spawn are excessive, particularly because of Ritualist kill requirement.
On top of that, those who don't enjoy Aividem or don't have team to play with regularly need to be there and arrange a team for many hours since both guards and ritualist take place in the same hunt.
Edit: a lot of salty people downvoting that probably finished task already and don't want others to have a pleasant time when they suffered.
You cannot deny that this task is currently in a completely different category compared to any other kill task pre-sanctum. Completion will easily take over 6 hours with a 4 man team.
Other tasks have seen their kill count reduced. Its only fitting this one is adjusted too.
Doesnt have to be drastic, just more manageable.