Shameda is not good with absorbing flames, or probably anything hot. So absorption of lava is out for sure (though not entirely useless because he defeated the 4 tails which creates lava). Then you have her other kegigenki. If shameda could absorb that before it melted then he could have that rendered useless, but im not sure if it could do that. Then kisame is a master of water ninjitsu. But it is weak to earth techniques which mei I assume is at least good with. If kisame tech is My vote goes for Mei as well.still stronger then she could infuse that with fire to make lava, which as I already established can't be absorbed, by shameda or by touch.
So weak against lava techs
No defense (to my knowledge) to boil
Water techs weak against earth
So my vote is for Mei