Right now, I’m currently working through the Spikes section of the Hazards guide, writing up current thoughts on Latias, working on the Latias analysis, writing up a few thoughts on Deoxys-A (In case no one posts – current slash order might need some tweaking), updating Arceus overviews, and slowly polishing Arceus-Normal’s analysis. Progress is a little slow due to pressing commitments, but my schedule frees up significantly in two weeks.
P.S. If you have the time, please take a brief look at this post, and then check the second last sentence of this post. It might help make the post a little more accurate. Still, I imagine Sun Support Arceus-Water is probably the closest thing to a true counter as the very rare Timid Choice Specs Draco Meteor and Life Orb SolarBeam (which apparently is now SC) are literally the only ways Reshiram can possibly overpower Him.