As for tricks: A lot of the tricks here YoYoExpert.com - Yo-Yo Tricks, Videos, and More - Make the Simple Amazing! from “intermediate” to “expert” will work really well.
I recommend-
From Intermediate:
Dizzy Baby
Rip Cord
Brain Twister
Mach 5
Split the Atom
Atomic Bomb
(You’ll need Man on Trapeze and Double or Nothing, but they’re more elements for other combos.)
Almost everything in Advanced Parts 1&2 are good. Pick your favorites, but definitely:
Eli Hops
Leg Wraps
Boingy Boing
The Matrix
Zipper
Boomerang
From Expert:
Skin the Gerbil
Revolutions
Jade Whip (good for your own combos)
Gyroscopic Flops
Suicide (Will probably take a lot of practice, and may be a long time before you can get consistent enough to do them in a show. They are flashy though!)
Anything behind the back is a crowd pleaser.
Vermicious Knid, Tricks w/ light up yo-yos - #5 by Myk_Myk