Trif's original deck profile ran 3 of "Mythical Beast Master Cerberus", but recently I found that it would often brick in my hands, and even if I started with it, it usually wasn't even protected when it had those 4 spell counters on it, so I replaced 2 of them with Jester Confits. Additionally: Magister and Mythical Institution often became bricks in my hand, and running Desires at 3 was a disaster when I'd have multiple copies in my starting hand, so I took out one of each and added in 1 Black Fang Magician and 2 Purple Poisons. Since this added a lot more DARK monsters to my deck, I replaced "Into the Void" with 1 "Allure of Darkness", because I didn't like the discard effect of the former.
For the extra deck, I changed it so often that I don't remember exactly what was in Trif's original? I think it had 3 Selene? I replaced 1 of them with a Thousand-Eyes Restrict which I would sometimes use in place of Millennium-Eyes whenever I played Instant Fusion, depending on my situation (though it would usually still be Millennium-Eyes more often than not). In place of Appollousa I added 1 Abyss Dweller because of all the L4 Monsters I added in and because even when I would set up a fairly decent board with a good handful of negates, the sheer the amount of floating effects from some of these meta-decks I've been facing are still able to play through the negates and then still overwhelm me.
Anyways I'm still a novice when it comes to pendulums and deck building in general, if you guys know any cards I should switch out for better combos/consistency, please do tell me. Thanks.