I've done this myself and made the strat, so I can assure it works and can save you time.
This is a strat to get to baron rivendare from the beginning of strat with in 1-2minutes average and back out again by 2-3 minutes average. I've done this with a timer and have screenies.
FIRST THING IS FIRST IF YOUR A ROGUE.. There have been multiple occasions where I used the insta lockpick glyph to open the gates and them becoming unusable after opening and staying closed permanently, cause I clicked twice. So only click it once. Now for the strat.
Open the gate and run past all the mobs *Avoid everything as much as possible and avoiding everything is possible up to the shortcut and the A-Bombs*
Open the next 2 gates, go left *map*, and stay to the right side of the street while heading toward the shortcut 'trap'. To save 20 seconds of your time USE A SPEED BOOST OF SOME KIND TO MAKE IT THROUGH and AoE the beetles or aggro dump on the otherside.
Head NorthWest on the map to the big gate, there should be 3 boxes outside around that area. You want to set off the ones that are traps. [If they're lootable, it won't open the gate] Once you set off 2 of the box traps *again avoid mobs a.m.a.p* and the gates will disappear.
Open 2 or 3 boxes outside of rivendares castle to despawn both the doors inside *Make sure the crates disappear when you set them off*
[IMG]http://i984.photobucket.com/albums/ae325/Linklolwut/WoWScrnShot_071609_013948.jpg?t=1247812139[IMG]
Kill baron and hope for the mount. Turn around, go outside
First timed run took me 3 minutes to go in kill baron and out
With raised at a 1% drop rate you should be able to get it within 100 runs (STATISTICALLY) while keeping up the with 5 instance resets an hour timer. Hopefully sooner. Good luck. Flame, high-five, etc. This is a compilation of the tricks on this site with a self performed test-run and hopefully will help people who came in late to wow to know Strat's tricks and boss event mechanics.
THANK YOU, Sonkist