What would you purchase for poison Pathfinder with 1.500 Divine

Maybe a higher ES helm. Or you could try your luck at sanctifying. Could grab a hinelock and use it on your bow and see what sanctify / corrupting would do to it

Edit: bows done already maybe your amulet then or quiver

Another timelost instead of that regular emerald would be a big upgrade, probably effect of notables, crit damage, radius to large and ailments. Helmet can be a lot better as well, 600+ ES with double res and rarity. Next step is chasing the same items but with more sockets and gg corruptions, like wxceptional hyrre's ire with 25% as extra and chaos res corruption, HH with ES and res corruption, corrupted jewels, your gloves with three sockets instead of one, etc

More sockets where you can have more. Helmet has minion skills, bow has + 4 and not 5 to projectiles, quiver can be better without the dex roll.

A life lol