I 100% all 3 of them, origin and odyssey twice. Also 100% fenix risen.
Odyssey main game is straight up meh the only thing that saved that is the architecture and combat which was probably the best of the 3 ( combat i mean only ), its more builded for a mmo player then a sony player for example as it has lots of repeatable shit that will grind your eye balls out. which will get teddious to the point u just want it ot be over with, i would never 100% it if you don't know what u are getting into.
The DLC atlantis is what makes odyssey good to even great in my opinion. I would straight up say skip the main game go straight into atlantis but u will miss some story lines at that point. If you however found origin a long process then yea skip the main game of odyssey for sure and Atlantis dlc will serve you well.
Origin theme and actors where good, gameplay was good. enviroment was godly and architecture was godly. The god worlds where also solid. It had a bit of everything. However 100% it can get tedius if you don't like a bit of a grind. First DLC was a snack second big dlc was absolutely fantastic but aged a bit specially after playing the newer AC's. So yea i can see where u are coming from.
Valhalla is more like origin with all dlc's and 40% more content on top of it in the base game. It has everything in it lots of content and lots more fine tunings to make the game a lot more servicable. The only real complain i have with the game is the combat and talent tree is kinda shitty. Its a downgrade from odyssey. There are some systems that simple are not working well such as raids or boats after u leave norway. But in general the game is riddled with content and good content at that. The gear system u etiher like it or hate it, i personally think its a step forwards but still not enough.
But with 3 worlds + 2 god worlds the game is simple great.
I would vote for Valhalla > origin > odyssey
Fenyx great game, puzzles are solid and the world is well done and combat is actually really fun. Main complain the game for me has, lacks heavy amounts of content for the price they are asking for it. Shrines gets old fast, and skills need to be more. Also a bit bigger world with more variety would be nice as there wasn't much on that front. still great game.
Combat wise the game dumpsters the other AC games, but because its so different from ac games and more botw type of game i can't really compare it with the other ones. As combat wise its by far better but then content wise it's probably half that of origin.