First off, you outright claimed that myself and Tadacho were wrong, purely based on the fact that you could not accomplish the same thing. I'm sure that people are going to get defensive or claim otherwise, but your posts certainly convey this message. In any case, this is what happened when I tried to post an explanation of one possible outcome:
"The text that you have entered is too long (2442 characters). Please shorten it to 1000 characters long."
So I'll split it up I guess...
Landenel does not have a spectacular deck either, Ifrit and Titan are hardly better than most 2 star cards and usually one of the two will usually be played first whether you can take it or not makes no difference because Landenel will always put them somewhere that is advantageous to you. Next, the ideal situation is Ifrit being placed on the bottom right, from here you can easily bait Bahamut or Odin if you've got a halfway decent card, Rhitathyn or Succubus work extremely well if you are lucky enough to pull one of them. Odin will either take it and leave himself exposed, or be placed on top of it for no effect. If he uses Bahamut that's still fine because you can easily capture him in that position. His other cards are nothing to worry about, but you need to prepare for the second 5 star, so at this point I pretty much try to trade cards with him in order to minimize the use of his remaining 5* (sometimes there is no second one, but better safe than sorry). This is why your cards for the most part don't matter, but I'd say you need at least 2 good corner cards and a halfway decent epic or legendary, your other two cards are simply used to block off the board and recapture or to take his exposed cards.
This is just a partial explanation of one possible outcome/flow of the match, it's not an exact science and there's some odd RNG, but there's nothing bad that will happen otherwise, and sometimes he will use odin defensively in the corner or something and sets up the possibility to take him for free with your legendary. If you analyze the sides of his cards, you should know what directions he can take, and which he can not at all times, the right side of the board is a very good place to start, and you will realize that you do not need as many good cards as you may think, because your defenses will be set up by taking his exposed cards. This is why I say that brute force is a bad way to go about it, I'm not afraid to sacrifice cards to control the board because I can easily take them back later, I know which spots are best to bait and which are best played defensively, as well as which spots are dangerous.
I spent my time developing a real strategy, while others spent their time complaining for no reason. This is why I am reluctant to help you.
Edit: I could elaborate a lot more, but I think I got my point across. Which is that people are focusing on the wrong aspects of this matchup and are not noticing his obvious weaknesses because they think his cards are too strong. A human being has the ability to think, NPCs do not.