Jonas is no better than Nurkic, IMO. He's more of an interior presence but can't pass at all. As a backup I'm not sure he'd help much since I believe we need someone who can play with Nurkic and Jonas definitely could not.
Jonas is on a good contract though. $9.9 million this year, $10.4 million next year, and $10 million even in 26-27 but that last season isn't guaranteed.
If we could swing 2 deals somehow, bringing in Collins and Jonas then I'd like our frontcourt a lot more. Collins has experience playing with bigs and is someone who can stretch the floor. So there would be more options. Unfortunately I don't see how the Suns could pull that off unless a 3rd team was involved to receive Grayson, sending someone to Washington. We don't have a salary other than Grayson that would work financially fod Jonas. Okogie and Royce both fall short by a few hundred thousand. I could see Washington being interested in Okogie since they could free up money this off-season that Valenciunas is owes.