J man could use his hair to intangle with Kakuzu if he gets caught. Not saying Jman hair is as strong. But Jman in sage mode is not going to be man handle in his body form either especially by threads like other people did.
Now you say futon and katon the toads are not going to go out like that. Gam has fire bullet that equal the same thing as the fire mask
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And when summon many times j man stand on top of gumbata. Those little mask are nothing against the toads.
and if they are caught by a toad a smashing of the mask would happen like Choji did to the other mask by smashing them.
Or water release
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If you want you can say they can fly but toads can hop and we seen Gam and the other hop into the air. They hop pretty high.
And lets not talk about tanking. Jman could just summon a frog and take Kazu prisoner inside the frog. Good as gg
Basically one toad alone took on a tail beast. I think mask would not be an issues for three