Hi !
They patched the exploit to reach the 2nd boss Route 3 in Arah but I found a new way to get there
After you kill the first boss, you can either run back or TP and run to the spot shown in the video
You need a speed buff in order to make the little jump or get a mesmer in your group that can portal you
The video explains it all
Enjoy
If this gets fixed you can use my Arah farm guide to farm almost just as fast legitimately
8 Shard 10 Min Arah farm guide (Arah Shard Farming - 8 Shards 10 mins)