Most(all?) macro lenses are fixed maximum aperture.
What changes at 1:1 is the extension between the optics and the film. You lose two stops and there's nothing that can be done. It's a law of physics, AKA science stuff. Also, if you break the law, you may get a ticket.;P

So, Tripod for stability or light(to use a higher shutter speed.) to stop subject movement.
This one will work too. build a wind break to put around the subject. A diffuse cloth and four pieces of dowel to stick in the ground.
For one side those corrugated plastic sign that are all over the, but it's illegal to just take them.