Ontop of Ivory Tower
First Get out of ivory tower by following the instructions below. When you first pop out of the wall hold in back so you land on the ledge and dont fall all the way to the bottom. Have another person do this as well. When you are both on the ledge, stand by one of the pillars and have your team mate jump ontop of you. Then Sword jump all the way until you are above the walkway. Hold left so you both land ontop of the walkway. Then stand in the corner and do the sword jump until you successfuly land ontop of the level.

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Outside of Ivory Tower
To do this get 2 players and go where the overshield is. Have player 1 go a little above this and fall on the ledge right under the ramp. Have Player 2 get infront of you through the glass. Right infront of the steel beam on the lines. Then have player 1 Lunge with the sword and you should go right through. This may take some tries to do. (NOTE: do not sword cancel, do a regular slash.)

Tree Sniping

You can jump in the trees in several spots. A good sniping location is the closest tree above where the flag normally is on 1 Flag CTF games. To get there, get up on the second level, then crouch jump onto one of the metallic gray struts, the left one (while facing out towards the tree) works best. Then from there, crouch jump to the tree. It takes practice but after 10 tries you should be able to get there rather easily.

Get Stuck on the corner on top of the Air Lift.

Goto the air lift by the plasma pistol. Have one person go up the lift and the other person sword cancel off of them when they come up. This should get you stuck. If you want out get killed or sword cancel out.