the only reason given in the article for not taking H2 blockers and PPI's at the same time is that the H2 blockers can make the PPI's less effective. But, if your issue is trying to wean off PPI's and not using PPI's to maximum efficacy, to me that doesn't seem to be an issue. OTOH, for someone with a bleeding ulcer, for example, that could be a big issue, so as always these things need to be individualized.
I thought there was a lot if good lifestyle advice in the article. There are also certain foods that can make GERD worse, and I'm sure someone can round up a list of them somewhere on the all-knowing internet. Mint and, sadly, chocolate, come readily to mind, and of course anything acidic. But there are more.