I haven't seen a guide, and as a Triple Triad enthusiast I can tell you there is no substitute for trial and error.

I built all my decks piece by piece by playing NPCs over and over, examining why I lost, what cards could have better helped me win in that scenario, and continually re-evaluate and update my decks until they have an ultra high win ratio (notwithstanding Chaos which is a crap shoot).

I will tell you what I use. It's somewhat against my better judgement since I don't want people to know my strategy and thwart me in future tournaments, but hey, why not.

Ascension Beastman deck: Amalj'aa, Memeroon, Mutamix, Scarface, Squall. The key here is Amalj'aa because it can easily be re-taken when placed in top center or bottom right. So when you are starting out, always put out the bait, even if you don't have the first move. If you go 2nd, place the card in 1 of the 2 positions I mentioned that is not adjacent to their card. After this you occaisonally you may want to take their card vs. taking back your own card, depending on your options. The goal being to always take what you can take when you can take it while also fortifying your position. If you can take 2 things, take the one that leaves you with the most available options while trying to use up cards that don't have any other potential utility.

Standard deck: Squall, Nero, Y'shtola, Gilgamesh & Enkidu, Titan. Playing Y'shtola in the bottom left is a great play I stole from Elmer, because most people can't take it without using Squall and being vulnerable from the top. Otherwise it boils down to one decision point every turn - fortify or bait. I only fortify if I'm confident the card can't be taken. Otherwise bait with 2 vulnerable sides is better so that after the take + take-back that card is quarantined safely.

Plus deck: Bartz, Miounne, Baderon, Gilgamesh & Enkidu, Raya & A-Ruhn. This deck is pure money against Elmer. If he plays Y'shtola, place Miounne diagonally up-right from there, and you'll have a Plus play on both sides. If he plays Urianger in the bottom right corner, having Bartz in the top right opens up a Plus play for Baderon at right middle. If he takes Baderon with Godbert, you have a Plus play with Gilgamesh above that. Raya and A-ruhn are the cleanup crew that I like to call Bahamut's Bane, because they can take from the right, and very often Plus from the left.

Other Plus tips are to be aware of whether a card can be taken by Plus, and to cut off or create those avenues as desired. Maybe you can't take a card, but you can do a fortify play where if by chance you lose that card to Plus it won't take any other cards down with it. Or maybe you hide a card behind your opponent's cards so it's safe. Or maybe you put something out with one strong side and one weak side knowing your opponent will likely take the weak side, but the card it's next to has a Plus play you can take back with.

Also, build every deck under the assumption it will be an Order game. That way you don't need separate decks for that.

I also have a Roulette deck which has a combination of cards that are good for Plus and Ascension, as well as an Alternate deck which is similar to my main but doesn't have any "Type" cards that would be detrimental in a Descension game.