I think most people prefer to start Doran's Blade and buy Tear on first back, and it's what I think is stronger. Tear first makes the most sense when you intend to give up on your lane and scale faster.

Absolutely anything you want, there are no priorities for the champion itself.

It's only a little worse than Divine Sunderer but you're right, I just updated the build. I'm also going to have to re-update some of my other ADC guides since I have a better grasp on the items now.

For Hextech Gunblade, as of know, it is removed from the game on standard LoL, I would imagine that it would be a decent buy on WR, but I would also bet that you can build whatever you want on wild rift because of the way the game is set up.

Apologies for the late response.

1. Lethality isn't good on Ezreal, he needs early AD to help last-hit and trade early on since he won't have AD from any source other than Doran's Blade.

2. If you want to get 10% CDR from your runes, the better way to go about it is to run x6 scaling CDR glyphs and 3 MR glyphs, so you don't just get ****ed by mage supports (though you're still way more vulnerable than with 9 MR glyphs which is why this setup isn't common on Ez).

3. Ionians wouldn't make you overcap on CDR so they're still the best Boots even if you have CDR glyphs.

4. Lethality isn't a replacement for % armor pen; in fact they synergise pretty well, running lethality would make Lord Dominik's Regards even better.

5. If you don't need to run a Last Whisper upgrade there are better alternatives suggested in my guide. Infinity Edge isn't good on Ezreal because it's only good when combined with at least one other crit item, and since Ezreal has more important items to build (that synergise with both autos and Mystic Shot, as opposed to just autos), 6 item slots isn't enough to fit Infinity Edge and one other crit item.