My current lighting setup, suggestions ?

Might want to ask same question in studio and lighting sub forum, but you'd need to add 2 lights down low for more control of the light on model's legs.

Have you tried aiming the fireball (maxilite) a little lower?
What's the dimension of you space?

That's sort of the dimensions i took the image with a 35mm on full frame 6D.
I use a 70-200 at 70 for most of my full bodies shots that's about how long the room is.
So 3,5m x 5,5m but with those doors i can put some lights on the rooms next door.

Getting an extra fireball would probably be the way to go,?i usually use a 120cm octa but it has the same issues because of the distance, this model had too perfect skin to use an Octa.
In an ideal world i would have a large dedicated studio with a high ceiling where i could place the lights at a distance optimal for lighting.

I really like the fireball though so getting an extra one would be a problem it's super handy still relatively soft and is super easy to bring and use when outdoors.
For the moment i might use the 26cm reflector on her legs as an interim as i have it ?

These shots are for underwear promotion in Sweden and i want them to look as stellar as possible

Use a moon light for fill and put the model light high and center, I use a large horizontal soft box. That setup is flawless since you never have to worry about double shadows, it gives skin a great graduated shine, models can move wherever and the lighting is alway right without having to move anything. I do many other setups but this is my go to for new models and many other times. You can hit a light grey background with an overhead to make it white or put a grid on the softbox to make it grey. I use wall mounted brackets in my studio for this setup and use stands when I am doing more dramatic lighting.

I also sometimes add in hair backlighting.

I'd recommend a 2-meter silvered umbrella for that main light. The size will cover the model completely and the sliver will keep the contrast sparkling. It will also have quite a significant throw distance without losing exposure. They can be had fairly cheaply these days--I'd expect around 40-60 euro.

You can also think of using a large V-Flat as a bounced box. Two 4x8' Foam core boards should do the trick.

What's a moon light ?

Another vote for v-flats

A moon light is a ring light with softbox like diffusion. It is my go to fill light since you never have to worry about multiple shadows and always provides correct fill angle. The only drawback is that you need to adjust power as you chsnge your distance from the subject since it is mounted to your camers. Of course you can always use it off camera as a softbox. Or as the main light when your subject is near a wall and you want the ringlight edge shadow look.

Aye! You have three lights available orrr more?