Give me what you got.

Both the property of intentionally allowing an animal to die an agonizing death in a forest fire, and the property of allowing a child to undergo lingering suffering and eventual death due to cancer, are wrongmaking characteristics of an action, and very serious ones.

Our world contains animals that die agonizing deaths in forest fires, and children who undergo lingering suffering and eventual death due to cancer.
An omnipotent being could prevent such events, if he knew that those events were about to occur.

An omniscient being would know that such events were about to occur.
If a being allows something to take place that he knows is about to happen, and which he knows he could prevent, then that being intentionally allows the event in question to occur.

Therefore:

If there is an omnipotent and omniscient being, then there are cases where he intentionally allows animals to die agonizing deaths in forest fires, and children to undergo lingering suffering and eventual death due to cancer.
In many such cases, no rightmaking characteristics that we are aware of both apply to the case in question, and also are sufficiently serious to counterbalance the relevant wrongmaking characteristic.

Therefore:

If there is an omnipotent and omniscient being, then there are specific cases of such a being's intentionally allowing animals to die agonizing deaths in forest fires, and children to undergo lingering suffering and eventual death due to cancer, that have wrongmaking properties such that there are no rightmaking characteristics that we are aware of that both apply to the cases in question, and that are also sufficiently serious to counterbalance the relevant wrongmaking characteristics.

Therefore it is likely that:

If there is an omnipotent and omniscient being, then there are specific cases of such a being's intentionally allowing animals to die agonizing deaths in forest fires, and children to undergo lingering suffering and eventual death due to cancer, that have wrongmaking properties such that there are no rightmaking characteristics — including ones that we are not aware of — that both apply to the cases in question, and that are also sufficiently serious to counterbalance the relevant wrongmaking characteristics.

An action is morally wrong, all things considered, if it has a wrongmaking characteristic that is not counterbalanced by any rightmaking characteristics.

Therefore:

If there is an omnipotent and omniscient being, then there are specific cases of such a being's intentionally allowing animals to die agonizing deaths in forest fires, and children to undergo lingering suffering and eventual death due to cancer, that are morally wrong, all things considered.

Therefore:

If there is an omnipotent and omniscient being, then that being both intentionally refrains from performing certain actions in situations where it is morally wrong to do so, all things considered, and knows that he is doing so.
A being who intentionally refrains from performing certain actions in situations where it is morally wrong to do so, all things considered, and knows that he is doing so, is not morally perfect.

Therefore:

If there is an omnipotent and omniscient being, then that being is not morally perfect.

Therefore:

There is no omnipotent, omniscient, and morally perfect being.
If God exists, then he is, by definition, an omnipotent, omniscient, and morally perfect being.

Therefore:

God does not exist.

~