My first thought is that he should ship free health potion vending machines to every residence of more than 1000 people, to a minimum of one per 10k. With not just health potions, but nutrition, anti-disease, and more.
And then for the places where the government tries to monopolize them, put up a bounty on his website, "2% of a customized power-enhancing or power-granting no-maintenance tinker item for investigating and publicly reporting on the oppression of the people of X, in accordance with international law" or something.
The idea being to stick to more conventional-seeming interventions like shipping people vending machines rather than energy beings or anything. And instead of making them super inviolable or something, just keep replacing them. And use other thinkers and such as a proxy rather than showing too much personal power. Probably planning for governments, corporations, and the PRT to get most of the bounties.
The obvious downsides are a hit to the medical profession (a super-wide college/med school scholarship program with retroactive coverage could probably counter a lot of that), and issues with shipping "untested tinkertech" into urban centers. He might need to buy a vending machine company to get the licenses or something?
Maybe provide open-source super-smart forum software to PHO or something to make coordinating easier? And/or tracking of partial bounty credit?