Well, you won’t like what I have to say, but it’s based on repeated experience and measurements.
First, never take a speaker’s -3db point as any indicator of anything that’s happening in your room. The room will make the bass specs utterly useless in understanding what is actually happening. I’m attaching a link that goes over specific examples. Before picking a strategy you should measure what's happening in your room.
Second, the idea of keeping your main speakers going as low as possible because well, you paid so much money for them, is like buying a meal and only eating one half of it. Case after case where audiophiles changed their mind and tried raising the crossover frequency was a huge net positive, but no one likes to hear that their approach isn’t actually going to be optimal. 😪
Also take a look at the AM Acoustics Room Mode simulator and try to keep any speaker and listening location out of the worst/lowest modes.
Out of respect for my own sanity and the OP this is all I’ll say here.
https://speakermakersjourney.blogspot.com/2021/12/room-speakers-eq.html