"Draw the Jackass" tests are what you give folks that have no track record, and nothing to show you what they can do.
Speaking only for myself, I have a portfolio of over 40 open-source repos (single-origin -me), containing multiple build and deploy applications, SDKs, libraries, tests, hundreds of pages of documentation, dozens of blog posts, a decade of checkin history, and testimonials out the wazoo.
It is a mortal insult to ignore that (or, even worse, indicate that "I probably faked it"). If you want to hire people, then I suggest that you don't start by insulting them.
These are not people that you are doing a favor, by hiring them. These are people that are your equals -or better. I spent 25 years, interviewing and hiring senior-level engineers. I never gave one damn leetcode test. I did spend a great deal of time, drawing out their passion projects, enthusiasm, and personalities.
So much this!! I have been a paper millionaire more times than I care to remember, but none of them have panned out.
The downside of this is that you'll spend a greater amount of time interviewing people who are not appropriate for the role.
* Post the salary in the ad. At least a range.
* Pay folks for their take home assignment time. A few years ago, we paid senior folks $500. It is a token, not a contract, but it shows you care.
* If it is the people that make it great, profile them so that potential hires can see their awesomeness. Help them grow their profile (speaking, writing, OSS) if they want.
* Are you properly developing your junior folks so they can grow into seniors? Giving them autonomy, learning opportunities and salary bumps?
* Have a shorter hiring process. Maybe cut out the recruiter screen?
* As a hard bitten senior engineer, I can tell you that I value equity at zero. If I get an equity win, awesome! But I don't count on it. (You don't mention it, but thought I'd share that.)
* Sponsor a meetup (~$100/month). This is a long term play.
* Any other benefits/things that make you special? Why should anyone want to work there?
That said, I like a saying that I learned when I worked in the real estate industry during the great recession: "there's no problem that price can't fix".
There's no hiring problem that higher salaries can't fix. The higher salaries may cause other issues, but you'll get your hires.