rank 148 going to 149 shows no difference in current rank and next rank. What does it actually change?
http://www.raidloot.com/AA.aspx?name=companion's fortification&class=ShadowKnight 148: Companion's Blessing activates if your pet drops below 40% health in 4 phases lasting 18 seconds each. It protects against 25% of incoming melee damage up to 15000 points and heals 9000, 12000, 13000, then 14000 health every 6 seconds. 149: Companion's Blessing activates if your pet drops below 40% health in 4 phases lasting 18 seconds each. It protects against 25% of incoming melee damage up to 20000 points and heals 10000, 13000, 14000, then 15000 health every 6 seconds.
