I walk all three of mine together, too.
Nixon on the left & Nigel & Ruby on the right. None are spooks or high-prey.
It takes practice.
I used to put my arm right through all the loops and then hold the leashes farther down, but now I use a 'walking belt' and I LOVE it.
I started this thread a few months ago, after much consideration chose this belt
I don't put it aound my waist (I'm little and it's too big), but instead, I put one arm through and it lays on my shoulder.
Our leashes have lightweight caribineers (colour co-ordinated, of course!) and they just clip to the centre ring, which is at waist level. .
I LOVE it.
I still hold the leashes in my hands, exactly as if the belt wasn't even there, but I don't worry that I may drop one.
My three hounds combined are more than twice my weight...I would not walk then this way if they were spooks or high prey.