If it was one effect then it would be Lapse from DM. Fun to watch and Perform. If say Three, which i like performing a lot is a double phase Sandwich routine (includes Cameo 2), Back in time by Jay Sankey and, Ambitious Card.
You know dude, if you already know a lot of tricks, you shouldnt go asking for more tricks. In actual you dont really need them. I found the most effective way to perform, and which makes the performer an joyful in their practice and performance, makes the spectators joyful in experiencing is by giving every trick i do a background, or a story.
You should give your tricks a theme, like giving them clothes. I performed the double phase sandwich to magic friend who hates sandwich affects (he got put off with Waving the Aces and disliked them ever since), but when i performed it for him i added a story of Shinobi: Operation Rescue. After performing, he still tells me from this day, performing magic for him has a new door opened.
Or, give each cards personality. I tell you a secret of mines. I watched how Jordan Lapping added Steven Freeman's "Time Machine" trick with Swiss Made (Buck Twins), and i thought "Hey, he inspires me.". Most people would choose and attribute certain things with just one card only. I thought, "Why not spread it out?".
I used to play Yugioh, watch a lot of anime, so i know how to incoperate this "adding context" in a random way. For exmaple, the four aces, give them "special powers", or characteristics. Whenever i like to do time travelling themed effects with a deck, one card or two cards, i would use the Ace of Clubs. I will tell the Spectator, "I use the Clubs instead of the Spade because theres things inwhich the Clubs can do, that the Spade can't. For exmaple time warping.". Or for example, you could use the Ambitious explosion ending (Lee Asher) with the Ace of Spades, whenever i use the Ace, i will tell them, "This is the Leader of all Aces, thus stands out the most. Its called the Hero card.". Loads of variations you can use to empower your tricks you already know.
Simple tricks, like Four (Aaron Fisher) and Sloppy Shuffle Triumph gets good reactions, when you give them clothes. Like Joel Paschall said, "People don't wanna see magic, they don't know what it is.". For me this hits hard. I know i'm not pro, but i'm not those kids on youtube. If people dont want to see magic, but you want to (maybe forcefully) show them, it wont work. Because they dont believe in magic. Only one solution, present it as another context. I go by "Story telling". I have no powerful material like Believe, but i know a way to give my effects Armor, so that it becomes something powerful as well. For everyone thats different, one of the reasons of performing and joining this forum is to find how other people do it too. Its an astonishment.
What im trying to say is, if you can, dont go searching tricks, if you really need them, if you know they suit you, then get it. You will need it. If you already have Shinobi tools, why search for more?