I'll be honest though, even the weakest AvED episodes I still find highly entertaining. So far there's not an episode I think should be skipped or anything, though as any series some stand-out episodes. I also am curious how the second season may be handled since we know at the very least we're probably getting that.
If I had to tier the episodes personally so far...
-Top Tier Episodes-
-Episode 1: Very strong opening, great mixture of horror/comedy, stand-out scenes, almost all humor hits, some scenes actually creepy, stylistic, compelling to watch.
-Episode 8: First episode back in the cabin, some great atmosphere, fun encounters, some of the wittiest dialogue imo, but also creative set-pieces, maybe the best depiction of Evil Ash so far, fun twists and turns, well-paced and all three side-stories are interesting to watch.
-Good Episodes-
-Episode 2: Some stand-out scenes, ranging from the cat battle, barging into Kelly's house, sitting down and eating dinner, the talk with Ash's neighbors, etc. I think some of the funniest stand-alone jokes are in this episode, and some fun tension. Though I do think the Deadite battle and some of the in-between scenes could of been better.
-Episode 4: I actually really like this episode. I love the scenic beauty of this episode, the roads of New Zealand the the look of the Shaman's Hut. I think the driving scene and Nitro scene are a blast, and them first arriving at the Shaman's Hut. Likewise, Ash's tripping out moment is a stand-out moment for the series for me in some ways, I think it's a mixture of being funny, interesting, and yet developing Ash's history, and maybe one of the best 'trip out' scenes I've seen in media. Pablo and Kelly scenes could be better.
-Episode 6: Also loved this episode, loved the scenes early in with Amanda and Ruby, and loved all the diner scenes. From Ash being sleazy to Pablo and Kelly taking responsibility and some of their wise-cracks (and even their trailer scene with the Necronomicon), and of course the highlight of the episode, the fight scene at the end.
-Ehh Episodes-
-Episode 5: While the Pablo and Kelly scenes are fun, and the Shotgun scene and Pablo walking away from the Shaman's Shack with the firing burning is a great scene, it feels there's so many missed opportunities and failed execution in places. As I said above, the design of the demon is interesting and well-done, but the final fight with him was unfortunately kind of tame and lacking a punch to it. There's still interesting, funny, and entertaining bit, but it left far less of an impact than it felt it should. Few good gags though, such as Ash's tied-up and comments on Kelly possessed and the demon trying to get Ash to kill Kelly.
-Episode 7: Felt the most uneven in terms of quality. For once, I actually thought the Pablo+Kelly stuff wa stronger than the Ash stuff, the Amanda stuff felt kind of forced and even though I kind of liked the Deadite in this episode, it feels he wasn't used to the fullest potential, neither was the Milita. It just felt like some wasted potential in general. This said, there were still some stand-out moments and found it entertaining. Highlight is indeed probably the truck scene with Pablo and Kelly and Pablo's 'dilemma' of figuring out what weapon is his 'identity' weapon.
-Personal Least Favorite-
-Episode 3: I actually like this about the same as I liked episodes 5 & 7 and would still list it as an 'ehhh' episode, but I like it slightly less. I felt the humor was the weakest in this episode and it had some of the most stilted dialogue (still some good jokes, but less so than any of the other episodes). The beginning scene with Ruby, the summoning scene and scene with the demon are all quite good, but the middle of the episode drags on and it felt the writing was the weakest in this episode, in my opinion.
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But I still have enjoyed every episode, honestly. I haven't really thought any episodes so far have been straight-out bad or terrible, thus far. Even Episode 5 as my least favorite finally accomplished in making me like Pablo and Kelly finally, and I've come to like them more and more in the episodes past 5 as well, as a random example.
And if episode 8 is any sign, it looks like Episode 9 and 10 are going to be a lot of fun.