I really like the holographic floor, it looks amazing and actually has some functionality when used in gurubashi arena obj # 184828 Spawn it and you will see the way it is set up is ideal to have a duel in the center with two teams on either side.
Two object I love to use for stairs are the floating rock shards with the luminescent glow 181921 for big 181927 for small. The glow effect makes it almost impossible to target a player on your stair event and the shards are uneven so you have to work a little.
Hope you like it.