We had already seen WonderWoman was impervious to the gas. She is nearly as powerful as SuperMan.
So the perfect outcome would be for him to grab two parachutes, and bring WW with him. Take off, and then tell WW to grab the stick while he jumped off with the parachute. WonderWoman could survive the explosion, gas and fall.
There are reasons this plan might not work. First he might not be fully aware of Diana's power. At her best he only saw her take down a tower. Then, she had her hearing impaired. Even if she didn't, she was fully focused on Ares, believing he was the responsible for all the war, also meaning it'd be hard to convince her to leave her target behind. And finally, from the character perspective, he was constantly trying to protect Diana, he wouldn't suggest putting her in harms way, not if he could take her place.