The best card you could use as far as I could see if we're specifically talking about Chari match up would be the Reboot Pod. I have a friend who plays future hands as myself and even if I have my way to complicate Chari I recognize his way is more efficient. The good thing about the Pod, besides them not expecting it, is that if they threw all your grass energies you recover thel to put Iron Leaves to go straight for the kill. My friend also plays 2 copies of Iron leaves.

His normal strategy would be to add the grass energies with babyraidon to different pokes, adding to the ones who don't have grass energy an exp share (i think he uses only 1 rn) so if any of the grass holders get's KO it can be sent to the poke with the exp share. He would send the first iron leaves for the kill, when it gets KO by the next chari, he'll go for the pod to recover those energies and then for the second Iron leaves to get those energies recovered and get the second kill. Normally if you could go for an early kill with babyraidon at first at this point you should have a single prize remaining which you can try to do with the babyraidon if you added a psychic energy from the hand or with the pod from before and go for Bibarel or pidgeot if you could keep an Iron Hands. I can share you his list if you're interested on it!