Make a 2x2 square, put lava in one corner and water in the other to prevent incineration. put pressure plates to keep liquid seperate. place all the armour stands in the center of the square.
So today I got to the top of 6parkour the natural way, without ender pearls, block-glitching, or horses. This was a pretty big accomplishment for me, because I didn't even know if there WAS a way to the top. The parkour course was generated completely randomly (I believe that 15% of the blocks were set to sponge/glowstone, and the other 85% remains air). So yes, I'm pretty pleased for finding a path.