Optimizing joining in global scopes in Eloquent

I use global scopes to filter what a user can see. These chain together, so for example B can depend on A being readable with a simple $query->has('A') while A's scope does the heavy lifting.

My issue is that for one model, I have to chain together 6 tables. A simplified SQL equivalent of the query would be:

SELECT a.id
FROM a
JOIN b ON a.b_id=b.id
JOIN c ON c.b_id=b.id
WHERE
	c.property = true;

I wrote the above in Eloquent like this (not implemented as a scope yet):

\App\Models\A::
	whereHas('b', function(Builder $query) {
		$query->whereHas('c', function(Builder $query) {
				$query->where('c.property', '=', true);
			});
		});
	})->
	get();

Chaining all these whereHas methods is affecting performance. For the actual Eloquent query I'm using it results in 64 steps according to SHOW PROFILE; while the SQL one only requires 22. Of course, the Eloquent way adds the models' individual global scopes which I want and accept the complexity they add, but three times the steps feels unnecessary. How can I optimize this?

Also, I can't use the join method in a scope because that will make the joined table's column names conflict with the column names of the original table when Laravel does things like select on column names.