I know, people will declare me stupid but I made this stone before the healing stone for my holy priest.
The + healing bonus on the other stone is very nice but as a priest I must be able to do some quest solo and the healing version of this trinket is not good for that.

The downside is that it takes forever to get the 30 badges just for the 2 Nether Vortex.
Lucky for me, my brother, a little gnome warlock, helps out getting the materials to make all the parts for both stones.